30640641 has 8 divisors (see below), whose sum is σ = 41464224. Its totient is φ = 20122080.

The previous prime is 30640637. The next prime is 30640657. The reversal of 30640641 is 14604603.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30640641 - 2² = 30640637 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30640601) 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, 76020 + ... + 76421.

It is an arithmetic number, because the mean of its divisors is an integer number (5183028).

Almost surely, 2^30640641 is an apocalyptic number.

It is an amenable number.

30640641 is a deficient number, since it is larger than the sum of its proper divisors (10823583).

30640641 is a wasteful number, since it uses less digits than its factorization.

30640641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152511.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 30640641 is about 5535.3989016150. The cubic root of 30640641 is about 312.9194912481.

The spelling of 30640641 in words is "thirty million, six hundred forty thousand, six hundred forty-one".