13991466 has 16 divisors (see below), whose sum is σ = 28111104. Its totient is φ = 4642464.

The previous prime is 13991449. The next prime is 13991479. The reversal of 13991466 is 66419931.

It is a super-2 number, since 2×13991466² = 391522241658312, which contains 22 as substring.

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, 3891 + ... + 6566.

It is an arithmetic number, because the mean of its divisors is an integer number (1756944).

Almost surely, 2^13991466 is an apocalyptic number.

13991466 is an abundant number, since it is smaller than the sum of its proper divisors (14119638).

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

13991466 is a wasteful number, since it uses less digits than its factorization.

13991466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10685.

The product of its digits is 34992, while the sum is 39.

The square root of 13991466 is about 3740.5168092123. The cubic root of 13991466 is about 240.9652446681.

The spelling of 13991466 in words is "thirteen million, nine hundred ninety-one thousand, four hundred sixty-six".