307423920 has 160 divisors (see below), whose sum is σ = 1017792000. Its totient is φ = 76492800.

The previous prime is 307423877. The next prime is 307423969. The reversal of 307423920 is 29324703.

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

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 615831 + ... + 616329.

It is an arithmetic number, because the mean of its divisors is an integer number (6361200).

Almost surely, 2^307423920 is an apocalyptic number.

307423920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 307423920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (508896000).

307423920 is an abundant number, since it is smaller than the sum of its proper divisors (710368080).

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

307423920 is a wasteful number, since it uses less digits than its factorization.

307423920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 307423920 is about 17533.5084908868. The cubic root of 307423920 is about 674.9100346490.

The spelling of 307423920 in words is "three hundred seven million, four hundred twenty-three thousand, nine hundred twenty".