305238040 has 32 divisors (see below), whose sum is σ = 722934000. Its totient is φ = 115668864.

The previous prime is 305238019. The next prime is 305238113. The reversal of 305238040 is 40832503.

305238040 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×305238040² = 186340522126083200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 305237996 and 305238014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200055 + ... + 201574.

Almost surely, 2^305238040 is an apocalyptic number.

It is an amenable number.

305238040 is an abundant number, since it is smaller than the sum of its proper divisors (417695960).

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

305238040 is a wasteful number, since it uses less digits than its factorization.

305238040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401659 (or 401655 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 305238040 is about 17471.0629327468. The cubic root of 305238040 is about 673.3066213847.

The spelling of 305238040 in words is "three hundred five million, two hundred thirty-eight thousand, forty".