13658994 has 24 divisors (see below), whose sum is σ = 30395820. Its totient is φ = 4429728.

The previous prime is 13658989. The next prime is 13659011. The reversal of 13658994 is 49985631.

It is a happy number.

13658994 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 13593969 + 65025 = 3687^2 + 255^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9589 + ... + 10920.

Almost surely, 2^13658994 is an apocalyptic number.

13658994 is an abundant number, since it is smaller than the sum of its proper divisors (16736826).

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

13658994 is a wasteful number, since it uses less digits than its factorization.

13658994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20554 (or 20551 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 13658994 is about 3695.8076248636. The cubic root of 13658994 is about 239.0412794954.

The spelling of 13658994 in words is "thirteen million, six hundred fifty-eight thousand, nine hundred ninety-four".