30640605 has 16 divisors (see below), whose sum is σ = 49830144. Its totient is φ = 16073280.

The previous prime is 30640601. The next prime is 30640609. The reversal of 30640605 is 50604603.

It is an interprime number because it is at equal distance from previous prime (30640601) and next prime (30640609).

It is not a de Polignac number, because 30640605 - 2² = 30640601 is a prime.

It is a Curzon number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 15829 + ... + 17658.

It is an arithmetic number, because the mean of its divisors is an integer number (3114384).

Almost surely, 2^30640605 is an apocalyptic number.

It is an amenable number.

30640605 is a deficient number, since it is larger than the sum of its proper divisors (19189539).

30640605 is a wasteful number, since it uses less digits than its factorization.

30640605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33556.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 30640605 is about 5535.3956498158. The cubic root of 30640605 is about 312.9193686973.

The spelling of 30640605 in words is "thirty million, six hundred forty thousand, six hundred five".