307233136 has 30 divisors (see below), whose sum is σ = 692451960. Its totient is φ = 131671008.

The previous prime is 307233109. The next prime is 307233137. The reversal of 307233136 is 631332703.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307233137) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 195156 + ... + 196723.

It is an arithmetic number, because the mean of its divisors is an integer number (23081732).

Almost surely, 2^307233136 is an apocalyptic number.

It is an amenable number.

307233136 is an abundant number, since it is smaller than the sum of its proper divisors (385218824).

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

307233136 is a wasteful number, since it uses less digits than its factorization.

307233136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391901 (or 391888 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 28.

The square root of 307233136 is about 17528.0670925234. The cubic root of 307233136 is about 674.7703917726.

Adding to 307233136 its reverse (631332703), we get a palindrome (938565839).

The spelling of 307233136 in words is "three hundred seven million, two hundred thirty-three thousand, one hundred thirty-six".