30640580 has 12 divisors (see below), whose sum is σ = 64345260. Its totient is φ = 12256224.

The previous prime is 30640567. The next prime is 30640601. The reversal of 30640580 is 8504603.

It can be written as a sum of positive squares in 2 ways, for example, as 9535744 + 21104836 = 3088^2 + 4594^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 765995 + ... + 766034.

It is an arithmetic number, because the mean of its divisors is an integer number (5362105).

Almost surely, 2^30640580 is an apocalyptic number.

It is an amenable number.

30640580 is an abundant number, since it is smaller than the sum of its proper divisors (33704680).

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

30640580 is a wasteful number, since it uses less digits than its factorization.

30640580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532038 (or 1532036 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 30640580 is about 5535.3933916209. The cubic root of 30640580 is about 312.9192835925.

The spelling of 30640580 in words is "thirty million, six hundred forty thousand, five hundred eighty".