16013640 has 32 divisors (see below), whose sum is σ = 48041280. Its totient is φ = 4270272.

The previous prime is 16013623. The next prime is 16013653. The reversal of 16013640 is 4631061.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66604 + ... + 66843.

It is an arithmetic number, because the mean of its divisors is an integer number (1501290).

Almost surely, 2^16013640 is an apocalyptic number.

16013640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16013640 is an abundant number, since it is smaller than the sum of its proper divisors (32027640).

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

16013640 is a wasteful number, since it uses less digits than its factorization.

16013640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133461 (or 133457 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 16013640 is about 4001.7046367767. The cubic root of 16013640 is about 252.0557951537.

It can be divided in two parts, 16013 and 640, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 16013640 in words is "sixteen million, thirteen thousand, six hundred forty".