104001640 has 32 divisors (see below), whose sum is σ = 237215880. Its totient is φ = 41029632.

The previous prime is 104001617. The next prime is 104001641. The reversal of 104001640 is 46100401.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 80245764 + 23755876 = 8958^2 + 4874^2 .

It is a super-2 number, since 2×104001640² = 21632682245379200, which contains 22 as substring.

104001640 is a modest number, since divided by 1640 gives 1040 as remainder.

It is not an unprimeable number, because it can be changed into a prime (104001641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14889 + ... + 20728.

Almost surely, 2^104001640 is an apocalyptic number.

104001640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

104001640 is an abundant number, since it is smaller than the sum of its proper divisors (133214240).

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

104001640 is a wasteful number, since it uses less digits than its factorization.

104001640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35701 (or 35697 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 104001640 is about 10198.1194344840. The cubic root of 104001640 is about 470.2694094471.

The spelling of 104001640 in words is "one hundred four million, one thousand, six hundred forty".