307689136 has 30 divisors (see below), whose sum is σ = 616029396. Its totient is φ = 148874400.

The previous prime is 307689131. The next prime is 307689139. The reversal of 307689136 is 631986703.

It is a junction number, because it is equal to n+sod(n) for n = 307689092 and 307689101.

It is not an unprimeable number, because it can be changed into a prime (307689131) 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, 5371 + ... + 25381.

Almost surely, 2^307689136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 307689136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308014698).

307689136 is an abundant number, since it is smaller than the sum of its proper divisors (308340260).

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

307689136 is a wasteful number, since it uses less digits than its factorization.

307689136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20081 (or 20044 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 307689136 is about 17541.0699787670. The cubic root of 307689136 is about 675.1040615057.

The spelling of 307689136 in words is "three hundred seven million, six hundred eighty-nine thousand, one hundred thirty-six".