13224978 has 32 divisors (see below), whose sum is σ = 31651200. Its totient is φ = 4069008.

The previous prime is 13224961. The next prime is 13224989. The reversal of 13224978 is 87942231.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8718 + ... + 10121.

It is an arithmetic number, because the mean of its divisors is an integer number (989100).

Almost surely, 2^13224978 is an apocalyptic number.

13224978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13224978 is an abundant number, since it is smaller than the sum of its proper divisors (18426222).

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

13224978 is a wasteful number, since it uses less digits than its factorization.

13224978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18863 (or 18857 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 13224978 is about 3636.6162844051. The cubic root of 13224978 is about 236.4821250907.

The spelling of 13224978 in words is "thirteen million, two hundred twenty-four thousand, nine hundred seventy-eight".