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380785117 = 478101811
BaseRepresentation
bin10110101100100…
…101000111011101
3222112111212222111
4112230211013131
51234440110432
6101441314021
712302422456
oct2654450735
9875455874
10380785117
11185a41549
12a7635911
1360b7464b
143880212d
152366a347
hex16b251dd

380785117 has 4 divisors (see below), whose sum is σ = 388886976. Its totient is φ = 372683260.

The previous prime is 380785063. The next prime is 380785123. The reversal of 380785117 is 711587083.

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: 711587083 = 1150361861.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-380785117 is a prime.

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 380785117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380785127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4050859 + ... + 4050952.

It is an arithmetic number, because the mean of its divisors is an integer number (97221744).

Almost surely, 2380785117 is an apocalyptic number.

It is an amenable number.

380785117 is a deficient number, since it is larger than the sum of its proper divisors (8101859).

380785117 is an equidigital number, since it uses as much as digits as its factorization.

380785117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8101858.

The product of its (nonzero) digits is 47040, while the sum is 40.

The square root of 380785117 is about 19513.7161248185. The cubic root of 380785117 is about 724.8141367393.

The spelling of 380785117 in words is "three hundred eighty million, seven hundred eighty-five thousand, one hundred seventeen".

Divisors: 1 47 8101811 380785117