12399790 has 16 divisors (see below), whose sum is σ = 24036768. Its totient is φ = 4578336.

The previous prime is 12399787. The next prime is 12399809. The reversal of 12399790 is 9799321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47562 + ... + 47821.

It is an arithmetic number, because the mean of its divisors is an integer number (1502298).

Almost surely, 2^12399790 is an apocalyptic number.

12399790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12399790 is a deficient number, since it is larger than the sum of its proper divisors (11636978).

12399790 is a wasteful number, since it uses less digits than its factorization.

12399790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95403.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 12399790 is about 3521.3335542093. Note that the first 3 decimals coincide. The cubic root of 12399790 is about 231.4575988224.

The spelling of 12399790 in words is "twelve million, three hundred ninety-nine thousand, seven hundred ninety".