13422720 has 64 divisors (see below), whose sum is σ = 42791040. Its totient is φ = 3578880.

The previous prime is 13422719. The next prime is 13422733. The reversal of 13422720 is 2722431.

It is a tau number, because it is divible by the number of its divisors (64).

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, 1576 + ... + 5415.

It is an arithmetic number, because the mean of its divisors is an integer number (668610).

Almost surely, 2^13422720 is an apocalyptic number.

13422720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13422720 is an abundant number, since it is smaller than the sum of its proper divisors (29368320).

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

13422720 is an equidigital number, since it uses as much as digits as its factorization.

13422720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7013 (or 7001 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 13422720 is about 3663.7030447349. The cubic root of 13422720 is about 237.6549386048.

The spelling of 13422720 in words is "thirteen million, four hundred twenty-two thousand, seven hundred twenty".