13640732 has 24 divisors (see below), whose sum is σ = 28887264. Its totient is φ = 5501952.

The previous prime is 13640723. The next prime is 13640743. The reversal of 13640732 is 23704631.

It is a congruent number.

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, 13853 + ... + 14804.

It is an arithmetic number, because the mean of its divisors is an integer number (1203636).

Almost surely, 2^13640732 is an apocalyptic number.

It is an amenable number.

13640732 is an abundant number, since it is smaller than the sum of its proper divisors (15246532).

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

13640732 is a wasteful number, since it uses less digits than its factorization.

13640732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28685 (or 28683 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 13640732 is about 3693.3361612504. The cubic root of 13640732 is about 238.9346996895.

The spelling of 13640732 in words is "thirteen million, six hundred forty thousand, seven hundred thirty-two".