30942870 has 32 divisors (see below), whose sum is σ = 84872448. Its totient is φ = 7072608.

The previous prime is 30942869. The next prime is 30942881. The reversal of 30942870 is 7824903.

It is a super-2 number, since 2×30942870² = 1914922407673800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73464 + ... + 73883.

It is an arithmetic number, because the mean of its divisors is an integer number (2652264).

Almost surely, 2^30942870 is an apocalyptic number.

30942870 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30942870 is an abundant number, since it is smaller than the sum of its proper divisors (53929578).

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

30942870 is a wasteful number, since it uses less digits than its factorization.

30942870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147364.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 30942870 is about 5562.6315714777. The cubic root of 30942870 is about 313.9449712214.

The spelling of 30942870 in words is "thirty million, nine hundred forty-two thousand, eight hundred seventy".