30640790 has 8 divisors (see below), whose sum is σ = 55153440. Its totient is φ = 12256312.

The previous prime is 30640781. The next prime is 30640823. The reversal of 30640790 is 9704603.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1532030 + ... + 1532049.

It is an arithmetic number, because the mean of its divisors is an integer number (6894180).

Almost surely, 2^30640790 is an apocalyptic number.

30640790 is a deficient number, since it is larger than the sum of its proper divisors (24512650).

30640790 is a wasteful number, since it uses less digits than its factorization.

30640790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064086.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 30640790 is about 5535.4123604299. The cubic root of 30640790 is about 312.9199984712.

The spelling of 30640790 in words is "thirty million, six hundred forty thousand, seven hundred ninety".