307397940 has 24 divisors (see below), whose sum is σ = 860714400. Its totient is φ = 81972768.

The previous prime is 307397939. The next prime is 307397977. The reversal of 307397940 is 49793703.

It is a junction number, because it is equal to n+sod(n) for n = 307397892 and 307397901.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2561590 + ... + 2561709.

It is an arithmetic number, because the mean of its divisors is an integer number (35863100).

Almost surely, 2^307397940 is an apocalyptic number.

307397940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

307397940 is an abundant number, since it is smaller than the sum of its proper divisors (553316460).

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

307397940 is a wasteful number, since it uses less digits than its factorization.

307397940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5123311 (or 5123309 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 42.

The square root of 307397940 is about 17532.7676081102. The cubic root of 307397940 is about 674.8910221872.

The spelling of 307397940 in words is "three hundred seven million, three hundred ninety-seven thousand, nine hundred forty".