13640472 has 48 divisors (see below), whose sum is σ = 38553840. Its totient is φ = 4348608.

The previous prime is 13640453. The next prime is 13640479. The reversal of 13640472 is 27404631.

13640472 is a `hidden beast` number, since 13 + 640 + 4 + 7 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13640479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2463 + ... + 5774.

It is an arithmetic number, because the mean of its divisors is an integer number (803205).

Almost surely, 2^13640472 is an apocalyptic number.

13640472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13640472 is an abundant number, since it is smaller than the sum of its proper divisors (24913368).

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

13640472 is a wasteful number, since it uses less digits than its factorization.

13640472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8272 (or 8265 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 13640472 is about 3693.3009625537. The cubic root of 13640472 is about 238.9331816034.

The spelling of 13640472 in words is "thirteen million, six hundred forty thousand, four hundred seventy-two".