40139136 has 48 divisors (see below), whose sum is σ = 115507860. Its totient is φ = 13379328.

The previous prime is 40139131. The next prime is 40139147. The reversal of 40139136 is 63193104.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×40139136² = 3222300477652992, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40139131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16270 + ... + 18573.

Almost surely, 2^40139136 is an apocalyptic number.

It is an amenable number.

40139136 is an abundant number, since it is smaller than the sum of its proper divisors (75368724).

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

40139136 is a wasteful number, since it uses less digits than its factorization.

40139136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34863 (or 34848 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 40139136 is about 6335.5454382397. The cubic root of 40139136 is about 342.3912624783.

The spelling of 40139136 in words is "forty million, one hundred thirty-nine thousand, one hundred thirty-six".