855931690 has 32 divisors (see below), whose sum is σ = 1576895040. Its totient is φ = 334418304.

The previous prime is 855931667. The next prime is 855931753. The reversal of 855931690 is 96139558.

It is a super-2 number, since 2×855931690² = 1465238115892512200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 855931690.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68077 + ... + 79663.

It is an arithmetic number, because the mean of its divisors is an integer number (49277970).

Almost surely, 2^855931690 is an apocalyptic number.

855931690 is a deficient number, since it is larger than the sum of its proper divisors (720963350).

855931690 is a wasteful number, since it uses less digits than its factorization.

855931690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11766.

The product of its (nonzero) digits is 291600, while the sum is 46.

The square root of 855931690 is about 29256.3102594979. The cubic root of 855931690 is about 949.4666221051.

The spelling of 855931690 in words is "eight hundred fifty-five million, nine hundred thirty-one thousand, six hundred ninety".