30881970 has 48 divisors (see below), whose sum is σ = 91765440. Its totient is φ = 7058592.

The previous prime is 30881941. The next prime is 30881971. The reversal of 30881970 is 7918803.

It is not an unprimeable number, because it can be changed into a prime (30881971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23880 + ... + 25139.

It is an arithmetic number, because the mean of its divisors is an integer number (1911780).

Almost surely, 2^30881970 is an apocalyptic number.

30881970 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30881970 is an abundant number, since it is smaller than the sum of its proper divisors (60883470).

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

30881970 is a wasteful number, since it uses less digits than its factorization.

30881970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49039 (or 49036 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 30881970 is about 5557.1548475816. The cubic root of 30881970 is about 313.7388730624.

The spelling of 30881970 in words is "thirty million, eight hundred eighty-one thousand, nine hundred seventy".