13987222 has 16 divisors (see below), whose sum is σ = 21798000. Its totient is φ = 6723360.

The previous prime is 13987219. The next prime is 13987241. The reversal of 13987222 is 22278931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19897 + ... + 20587.

It is an arithmetic number, because the mean of its divisors is an integer number (1362375).

Almost surely, 2^13987222 is an apocalyptic number.

13987222 is a deficient number, since it is larger than the sum of its proper divisors (7810778).

13987222 is a wasteful number, since it uses less digits than its factorization.

13987222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071.

The product of its digits is 12096, while the sum is 34.

The square root of 13987222 is about 3739.9494648992. The cubic root of 13987222 is about 240.9408783886.

The spelling of 13987222 in words is "thirteen million, nine hundred eighty-seven thousand, two hundred twenty-two".