307032768 has 140 divisors (see below), whose sum is σ = 1040284432. Its totient is φ = 87713280.

The previous prime is 307032749. The next prime is 307032769. The reversal of 307032768 is 867230703.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (307032769) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 32058 + ... + 40518.

Almost surely, 2^307032768 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 307032768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (520142216).

307032768 is an abundant number, since it is smaller than the sum of its proper divisors (733251664).

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

307032768 is an equidigital number, since it uses as much as digits as its factorization.

307032768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8492 (or 8473 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 307032768 is about 17522.3505272552. The cubic root of 307032768 is about 674.6236717086.

The spelling of 307032768 in words is "three hundred seven million, thirty-two thousand, seven hundred sixty-eight".