13717720 has 32 divisors (see below), whose sum is σ = 31014720. Its totient is φ = 5460480.

The previous prime is 13717709. The next prime is 13717727. The reversal of 13717720 is 2771731.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13717727) 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, 8929 + ... + 10351.

It is an arithmetic number, because the mean of its divisors is an integer number (969210).

Almost surely, 2^13717720 is an apocalyptic number.

13717720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13717720 is an abundant number, since it is smaller than the sum of its proper divisors (17297000).

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

13717720 is a wasteful number, since it uses less digits than its factorization.

13717720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675 (or 1671 counting only the distinct ones).

The product of its (nonzero) digits is 2058, while the sum is 28.

The square root of 13717720 is about 3703.7440516321. The cubic root of 13717720 is about 239.3833707621.

The spelling of 13717720 in words is "thirteen million, seven hundred seventeen thousand, seven hundred twenty".