309164742 has 16 divisors (see below), whose sum is σ = 687032880. Its totient is φ = 103054896.

The previous prime is 309164707. The next prime is 309164753. The reversal of 309164742 is 247461903.

309164742 is a `hidden beast` number, since 3 + 0 + 9 + 1 + 647 + 4 + 2 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 309164697 and 309164706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2862583 + ... + 2862690.

It is an arithmetic number, because the mean of its divisors is an integer number (42939555).

Almost surely, 2^309164742 is an apocalyptic number.

309164742 is an abundant number, since it is smaller than the sum of its proper divisors (377868138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

309164742 is a wasteful number, since it uses less digits than its factorization.

309164742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5725284 (or 5725278 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 309164742 is about 17583.0811293129. The cubic root of 309164742 is about 676.1815552286.

The spelling of 309164742 in words is "three hundred nine million, one hundred sixty-four thousand, seven hundred forty-two".