13487640 has 32 divisors (see below), whose sum is σ = 40463280. Its totient is φ = 3596672.

The previous prime is 13487633. The next prime is 13487651. The reversal of 13487640 is 4678431.

13487640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

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, 56079 + ... + 56318.

Almost surely, 2^13487640 is an apocalyptic number.

13487640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13487640 is an abundant number, since it is smaller than the sum of its proper divisors (26975640).

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

13487640 is a wasteful number, since it uses less digits than its factorization.

13487640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112411 (or 112407 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 13487640 is about 3672.5522460545. The cubic root of 13487640 is about 238.0374679142.

The spelling of 13487640 in words is "thirteen million, four hundred eighty-seven thousand, six hundred forty".