307938645 has 32 divisors (see below), whose sum is σ = 625655040. Its totient is φ = 140771520.

The previous prime is 307938619. The next prime is 307938647. The reversal of 307938645 is 546839703.

It is not a de Polignac number, because 307938645 - 2⁶ = 307938581 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 307938645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307938647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161986 + ... + 163875.

It is an arithmetic number, because the mean of its divisors is an integer number (19551720).

Almost surely, 2^307938645 is an apocalyptic number.

307938645 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

307938645 is an abundant number, since it is smaller than the sum of its proper divisors (317716395).

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

307938645 is a wasteful number, since it uses less digits than its factorization.

307938645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325882 (or 325876 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The square root of 307938645 is about 17548.1806749304. The cubic root of 307938645 is about 675.2864956671.

The spelling of 307938645 in words is "three hundred seven million, nine hundred thirty-eight thousand, six hundred forty-five".