13638492 has 36 divisors (see below), whose sum is σ = 39400816. Its totient is φ = 3896640.

The previous prime is 13638479. The next prime is 13638503. The reversal of 13638492 is 29483631.

13638492 is a `hidden beast` number, since 13 + 638 + 4 + 9 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 11 ways as a sum of consecutive naturals, for example, 26809 + ... + 27312.

Almost surely, 2^13638492 is an apocalyptic number.

13638492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13638492 is an abundant number, since it is smaller than the sum of its proper divisors (25762324).

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

13638492 is a wasteful number, since it uses less digits than its factorization.

13638492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54138 (or 54133 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 13638492 is about 3693.0328999347. The cubic root of 13638492 is about 238.9216201611.

The spelling of 13638492 in words is "thirteen million, six hundred thirty-eight thousand, four hundred ninety-two".