13990566 has 32 divisors (see below), whose sum is σ = 28879488. Its totient is φ = 4515840.

The previous prime is 13990549. The next prime is 13990583. The reversal of 13990566 is 66509931.

It is an interprime number because it is at equal distance from previous prime (13990549) and next prime (13990583).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54310 + ... + 54566.

It is an arithmetic number, because the mean of its divisors is an integer number (902484).

Almost surely, 2^13990566 is an apocalyptic number.

13990566 is an abundant number, since it is smaller than the sum of its proper divisors (14888922).

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

13990566 is a wasteful number, since it uses less digits than its factorization.

13990566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516.

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 13990566 is about 3740.3965030462. The cubic root of 13990566 is about 240.9600778669.

The spelling of 13990566 in words is "thirteen million, nine hundred ninety thousand, five hundred sixty-six".