307940520 has 32 divisors (see below), whose sum is σ = 923821920. Its totient is φ = 82117440.

The previous prime is 307940513. The next prime is 307940527. The reversal of 307940520 is 25049703.

It is an interprime number because it is at equal distance from previous prime (307940513) and next prime (307940527).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (307940527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1282966 + ... + 1283205.

It is an arithmetic number, because the mean of its divisors is an integer number (28869435).

Almost surely, 2^307940520 is an apocalyptic number.

307940520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

307940520 is an abundant number, since it is smaller than the sum of its proper divisors (615881400).

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

307940520 is a wasteful number, since it uses less digits than its factorization.

307940520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2566185 (or 2566181 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 307940520 is about 17548.2340991907. The cubic root of 307940520 is about 675.2878662427.

The spelling of 307940520 in words is "three hundred seven million, nine hundred forty thousand, five hundred twenty".