910981990 has 16 divisors (see below), whose sum is σ = 1642436352. Its totient is φ = 363799744.

The previous prime is 910981987. The next prime is 910982041. The reversal of 910981990 is 99189019.

It is a super-2 number, since 2×910981990² = 1659776372208720200, 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 910981990.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67654 + ... + 79993.

It is an arithmetic number, because the mean of its divisors is an integer number (102652272).

Almost surely, 2^910981990 is an apocalyptic number.

910981990 is a deficient number, since it is larger than the sum of its proper divisors (731454362).

910981990 is a wasteful number, since it uses less digits than its factorization.

910981990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148271.

The product of its (nonzero) digits is 52488, while the sum is 46.

The square root of 910981990 is about 30182.4781951383. The cubic root of 910981990 is about 969.4005542743.

The spelling of 910981990 in words is "nine hundred ten million, nine hundred eighty-one thousand, nine hundred ninety".