Search a number
-
+
380784061 = 754397723
BaseRepresentation
bin10110101100100…
…100110110111101
3222112111211112101
4112230210312331
51234440042221
6101441305101
712302416420
oct2654446675
9875454471
10380784061
11185a40779
12a7635191
1360b74018
14388019b7
1523669d91
hex16b24dbd

380784061 has 4 divisors (see below), whose sum is σ = 435181792. Its totient is φ = 326386332.

The previous prime is 380784043. The next prime is 380784091. The reversal of 380784061 is 160487083.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 160487083 = 173927671.

It is a cyclic number.

It is not a de Polignac number, because 380784061 - 211 = 380782013 is a prime.

It is a super-2 number, since 2×3807840612 = 289993002223303442, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 380784061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380784011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27198855 + ... + 27198868.

It is an arithmetic number, because the mean of its divisors is an integer number (108795448).

Almost surely, 2380784061 is an apocalyptic number.

It is an amenable number.

380784061 is a deficient number, since it is larger than the sum of its proper divisors (54397731).

380784061 is an equidigital number, since it uses as much as digits as its factorization.

380784061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54397730.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 380784061 is about 19513.6890669089. The cubic root of 380784061 is about 724.8134667162.

The spelling of 380784061 in words is "three hundred eighty million, seven hundred eighty-four thousand, sixty-one".

Divisors: 1 7 54397723 380784061