12990396 has 12 divisors (see below), whose sum is σ = 30310952. Its totient is φ = 4330128.

The previous prime is 12990371. The next prime is 12990403. The reversal of 12990396 is 69309921.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 541255 + ... + 541278.

Almost surely, 2^12990396 is an apocalyptic number.

It is an amenable number.

12990396 is an abundant number, since it is smaller than the sum of its proper divisors (17320556).

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

12990396 is a wasteful number, since it uses less digits than its factorization.

12990396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082540 (or 1082538 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 12990396 is about 3604.2191942222. The cubic root of 12990396 is about 235.0755513833.

It can be divided in two parts, 129 and 90396, that added together give a triangular number (90525 = T₄₂₅).

The spelling of 12990396 in words is "twelve million, nine hundred ninety thousand, three hundred ninety-six".