13640416 has 24 divisors (see below), whose sum is σ = 26946864. Its totient is φ = 6796800.

The previous prime is 13640401. The next prime is 13640437. The reversal of 13640416 is 61404631.

It is a Smith number, since the sum of its digits (25) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12301 + ... + 13363.

It is an arithmetic number, because the mean of its divisors is an integer number (1122786).

Almost surely, 2^13640416 is an apocalyptic number.

13640416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13640416 is a deficient number, since it is larger than the sum of its proper divisors (13306448).

13640416 is a wasteful number, since it uses less digits than its factorization.

13640416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474 (or 1466 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 13640416 is about 3693.2933812520. The cubic root of 13640416 is about 238.9328546285.

The spelling of 13640416 in words is "thirteen million, six hundred forty thousand, four hundred sixteen".