Search a number
-
+
30074489 = 127236807
BaseRepresentation
bin111001010111…
…0011001111001
32002120221102222
41302232121321
530144340424
62552333425
7513425504
oct162563171
962527388
1030074489
1115a81455
12a0a4275
1362ccb73
143dcc13b
152990e5e
hex1cae679

30074489 has 4 divisors (see below), whose sum is σ = 30311424. Its totient is φ = 29837556.

The previous prime is 30074461. The next prime is 30074497. The reversal of 30074489 is 98447003.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-30074489 is a prime.

It is a super-2 number, since 2×300744892 = 1808949777222242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30074459) 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, 118277 + ... + 118530.

It is an arithmetic number, because the mean of its divisors is an integer number (7577856).

Almost surely, 230074489 is an apocalyptic number.

It is an amenable number.

30074489 is a deficient number, since it is larger than the sum of its proper divisors (236935).

30074489 is a wasteful number, since it uses less digits than its factorization.

30074489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236934.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 30074489 is about 5484.0212435767. The cubic root of 30074489 is about 310.9802098634.

The spelling of 30074489 in words is "thirty million, seventy-four thousand, four hundred eighty-nine".

Divisors: 1 127 236807 30074489