305042520 has 32 divisors (see below), whose sum is σ = 915127920. Its totient is φ = 81344640.

The previous prime is 305042459. The next prime is 305042527. The reversal of 305042520 is 25240503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305042527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1270891 + ... + 1271130.

Almost surely, 2^305042520 is an apocalyptic number.

305042520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

305042520 is an abundant number, since it is smaller than the sum of its proper divisors (610085400).

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

305042520 is a wasteful number, since it uses less digits than its factorization.

305042520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2542035 (or 2542031 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 305042520 is about 17465.4664982073. The cubic root of 305042520 is about 673.1628286594.

The spelling of 305042520 in words is "three hundred five million, forty-two thousand, five hundred twenty".