13978072 has 16 divisors (see below), whose sum is σ = 27588600. Its totient is φ = 6621120.

The previous prime is 13978057. The next prime is 13978099. The reversal of 13978072 is 27087931.

13978072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45829 + ... + 46132.

Almost surely, 2^13978072 is an apocalyptic number.

It is an amenable number.

13978072 is a deficient number, since it is larger than the sum of its proper divisors (13610528).

13978072 is a wasteful number, since it uses less digits than its factorization.

13978072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91986 (or 91982 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 13978072 is about 3738.7259862151. The cubic root of 13978072 is about 240.8883282839. Note that the first 3 decimals are identical.

The spelling of 13978072 in words is "thirteen million, nine hundred seventy-eight thousand, seventy-two".