12699988 has 12 divisors (see below), whose sum is σ = 25400032. Its totient is φ = 5442840.

The previous prime is 12699959. The next prime is 12699989. The reversal of 12699988 is 88999621.

12699988 is an admirable number.

It is a super-2 number, since 2×12699988² = 322579390400288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12699989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226758 + ... + 226813.

Almost surely, 2^12699988 is an apocalyptic number.

It is an amenable number.

12699988 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12699988 is a wasteful number, since it uses less digits than its factorization.

12699988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453582 (or 453580 counting only the distinct ones).

The product of its digits is 559872, while the sum is 52.

The square root of 12699988 is about 3563.7042526001. The cubic root of 12699988 is about 233.3105819087.

The spelling of 12699988 in words is "twelve million, six hundred ninety-nine thousand, nine hundred eighty-eight".