13987722 has 16 divisors (see below), whose sum is σ = 31972032. Its totient is φ = 3996480.

The previous prime is 13987681. The next prime is 13987723. The reversal of 13987722 is 22778931.

It is not an unprimeable number, because it can be changed into a prime (13987723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166479 + ... + 166562.

It is an arithmetic number, because the mean of its divisors is an integer number (1998252).

Almost surely, 2^13987722 is an apocalyptic number.

13987722 is an abundant number, since it is smaller than the sum of its proper divisors (17984310).

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

13987722 is a wasteful number, since it uses less digits than its factorization.

13987722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333053.

The product of its digits is 42336, while the sum is 39.

The square root of 13987722 is about 3740.0163101249. The cubic root of 13987722 is about 240.9437493185.

The spelling of 13987722 in words is "thirteen million, nine hundred eighty-seven thousand, seven hundred twenty-two".