13992678 has 24 divisors (see below), whose sum is σ = 34648848. Its totient is φ = 3997872.

The previous prime is 13992637. The next prime is 13992731. The reversal of 13992678 is 87629931.

13992678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13992678² = 391590075223368, which contains 22 as substring.

It is a congruent number.

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, 55401 + ... + 55652.

It is an arithmetic number, because the mean of its divisors is an integer number (1443702).

Almost surely, 2^13992678 is an apocalyptic number.

13992678 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13992678 is an abundant number, since it is smaller than the sum of its proper divisors (20656170).

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

13992678 is a wasteful number, since it uses less digits than its factorization.

13992678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111068 (or 111065 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 13992678 is about 3740.6788154024. The cubic root of 13992678 is about 240.9722022770.

The spelling of 13992678 in words is "thirteen million, nine hundred ninety-two thousand, six hundred seventy-eight".