13978672 has 10 divisors (see below), whose sum is σ = 27083708. Its totient is φ = 6989328.

The previous prime is 13978669. The next prime is 13978673. The reversal of 13978672 is 27687931.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13978673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436818 + ... + 436849.

Almost surely, 2^13978672 is an apocalyptic number.

It is an amenable number.

13978672 is a deficient number, since it is larger than the sum of its proper divisors (13105036).

13978672 is an equidigital number, since it uses as much as digits as its factorization.

13978672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873675 (or 873669 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The square root of 13978672 is about 3738.8062265916. The cubic root of 13978672 is about 240.8917748949.

The spelling of 13978672 in words is "thirteen million, nine hundred seventy-eight thousand, six hundred seventy-two".