13860972 has 18 divisors (see below), whose sum is σ = 35037548. Its totient is φ = 4620312.

The previous prime is 13860953. The next prime is 13860983. The reversal of 13860972 is 27906831.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 385027 = 13860972 / (1 + 3 + 8 + 6 + 0 + 9 + 7 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 192478 + ... + 192549.

Almost surely, 2^13860972 is an apocalyptic number.

13860972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13860972 is an abundant number, since it is smaller than the sum of its proper divisors (21176576).

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

13860972 is a wasteful number, since it uses less digits than its factorization.

13860972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385037 (or 385032 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 13860972 is about 3723.0326348288. The cubic root of 13860972 is about 240.2137678739.

The spelling of 13860972 in words is "thirteen million, eight hundred sixty thousand, nine hundred seventy-two".