30942642 has 16 divisors (see below), whose sum is σ = 62487360. Its totient is φ = 10213872.

The previous prime is 30942629. The next prime is 30942643. The reversal of 30942642 is 24624903.

It is not an unprimeable number, because it can be changed into a prime (30942643) 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, 24417 + ... + 25652.

It is an arithmetic number, because the mean of its divisors is an integer number (3905460).

Almost surely, 2^30942642 is an apocalyptic number.

30942642 is an abundant number, since it is smaller than the sum of its proper divisors (31544718).

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

30942642 is a wasteful number, since it uses less digits than its factorization.

30942642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50177.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 30942642 is about 5562.6110775426. The cubic root of 30942642 is about 313.9442001269.

The spelling of 30942642 in words is "thirty million, nine hundred forty-two thousand, six hundred forty-two".