305432428 has 24 divisors (see below), whose sum is σ = 622393632. Its totient is φ = 128429184.

The previous prime is 305432401. The next prime is 305432443. The reversal of 305432428 is 824234503.

It is a self number, because there is not a number n which added to its sum of digits gives 305432428.

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 7 ways as a sum of consecutive naturals, for example, 101425 + ... + 104392.

It is an arithmetic number, because the mean of its divisors is an integer number (25933068).

Almost surely, 2^305432428 is an apocalyptic number.

It is an amenable number.

305432428 is an abundant number, since it is smaller than the sum of its proper divisors (316961204).

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

305432428 is a wasteful number, since it uses less digits than its factorization.

305432428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205881 (or 205879 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 305432428 is about 17476.6251890919. The cubic root of 305432428 is about 673.4495207358.

The spelling of 305432428 in words is "three hundred five million, four hundred thirty-two thousand, four hundred twenty-eight".