13891404 has 24 divisors (see below), whose sum is σ = 32730880. Its totient is φ = 4585104.

The previous prime is 13891399. The next prime is 13891433. The reversal of 13891404 is 40419831.

It is a happy number.

It is a super-2 number, since 2×13891404² = 385942210182432, 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, 4384 + ... + 6855.

Almost surely, 2^13891404 is an apocalyptic number.

It is an amenable number.

13891404 is an abundant number, since it is smaller than the sum of its proper divisors (18839476).

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

13891404 is a wasteful number, since it uses less digits than its factorization.

13891404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11349 (or 11347 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 13891404 is about 3727.1173847895. The cubic root of 13891404 is about 240.3894371805.

The spelling of 13891404 in words is "thirteen million, eight hundred ninety-one thousand, four hundred four".