13640772 has 24 divisors (see below), whose sum is σ = 32233600. Its totient is φ = 4489056.

The previous prime is 13640747. The next prime is 13640777. The reversal of 13640772 is 27704631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13640777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6247 + ... + 8142.

Almost surely, 2^13640772 is an apocalyptic number.

13640772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13640772 is an abundant number, since it is smaller than the sum of its proper divisors (18592828).

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

13640772 is a wasteful number, since it uses less digits than its factorization.

13640772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14475 (or 14473 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 13640772 is about 3693.3415764048. The cubic root of 13640772 is about 238.9349332395.

The spelling of 13640772 in words is "thirteen million, six hundred forty thousand, seven hundred seventy-two".