693660390 has 32 divisors (see below), whose sum is σ = 1672690176. Its totient is φ = 184097760.

The previous prime is 693660389. The next prime is 693660397. The reversal of 693660390 is 93066396.

693660390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (693660397) 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, 48462 + ... + 61121.

It is an arithmetic number, because the mean of its divisors is an integer number (52271568).

Almost surely, 2^693660390 is an apocalyptic number.

693660390 is an abundant number, since it is smaller than the sum of its proper divisors (979029786).

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

693660390 is a wasteful number, since it uses less digits than its factorization.

693660390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109804.

The product of its (nonzero) digits is 157464, while the sum is 42.

The square root of 693660390 is about 26337.4332462372. The cubic root of 693660390 is about 885.2154092779.

The spelling of 693660390 in words is "six hundred ninety-three million, six hundred sixty thousand, three hundred ninety".