10640399 has 24 divisors (see below), whose sum is σ = 14227200. Its totient is φ = 7847280.

The previous prime is 10640387. The next prime is 10640429. The reversal of 10640399 is 99304601.

It is not a de Polignac number, because 10640399 - 2⁸ = 10640143 is a prime.

It is a super-2 number, since 2×10640399² = 226436181758402, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10640309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9722 + ... + 10760.

It is an arithmetic number, because the mean of its divisors is an integer number (592800).

Almost surely, 2^10640399 is an apocalyptic number.

10640399 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

10640399 is a deficient number, since it is larger than the sum of its proper divisors (3586801).

10640399 is a wasteful number, since it uses less digits than its factorization.

10640399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083 (or 1076 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 10640399 is about 3261.9624461358. The cubic root of 10640399 is about 219.9476390540.

The spelling of 10640399 in words is "ten million, six hundred forty thousand, three hundred ninety-nine".