30642936 has 32 divisors (see below), whose sum is σ = 77535360. Its totient is φ = 10090592.

The previous prime is 30642929. The next prime is 30643021. The reversal of 30642936 is 63924603.

It is a junction number, because it is equal to n+sod(n) for n = 30642897 and 30642906.

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, 5700 + ... + 9683.

It is an arithmetic number, because the mean of its divisors is an integer number (2422980).

Almost surely, 2^30642936 is an apocalyptic number.

It is an amenable number.

30642936 is an abundant number, since it is smaller than the sum of its proper divisors (46892424).

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

30642936 is a wasteful number, since it uses less digits than its factorization.

30642936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15475 (or 15471 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 33.

The square root of 30642936 is about 5535.6061998665. The cubic root of 30642936 is about 312.9273036641.

The spelling of 30642936 in words is "thirty million, six hundred forty-two thousand, nine hundred thirty-six".