104990640 has 80 divisors (see below), whose sum is σ = 344629728. Its totient is φ = 26349568.

The previous prime is 104990617. The next prime is 104990651. The reversal of 104990640 is 46099401.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×104990640² = 22046068975219200, which contains 22 as substring.

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, 8787 + ... + 16946.

Almost surely, 2^104990640 is an apocalyptic number.

104990640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

104990640 is an abundant number, since it is smaller than the sum of its proper divisors (239639088).

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

104990640 is a wasteful number, since it uses less digits than its factorization.

104990640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25766 (or 25760 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 104990640 is about 10246.4940345466. The cubic root of 104990640 is about 471.7553793244.

The spelling of 104990640 in words is "one hundred four million, nine hundred ninety thousand, six hundred forty".