40865136 has 80 divisors (see below), whose sum is σ = 116409216. Its totient is φ = 12273408.

The previous prime is 40865129. The next prime is 40865141. The reversal of 40865136 is 63156804.

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

It is a junction number, because it is equal to n+sod(n) for n = 40865097 and 40865106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26071 + ... + 27593.

Almost surely, 2^40865136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40865136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58204608).

40865136 is an abundant number, since it is smaller than the sum of its proper divisors (75544080).

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

40865136 is a wasteful number, since it uses less digits than its factorization.

40865136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590 (or 1584 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 40865136 is about 6392.5844538809. The cubic root of 40865136 is about 344.4432271279.

The spelling of 40865136 in words is "forty million, eight hundred sixty-five thousand, one hundred thirty-six".