40001136 has 160 divisors (see below), whose sum is σ = 128563200. Its totient is φ = 10457088.

The previous prime is 40001111. The next prime is 40001161. The reversal of 40001136 is 63110004.

It is an interprime number because it is at equal distance from previous prime (40001111) and next prime (40001161).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 268390 + ... + 268538.

It is an arithmetic number, because the mean of its divisors is an integer number (803520).

Almost surely, 2^40001136 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 40001136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64281600).

40001136 is an abundant number, since it is smaller than the sum of its proper divisors (88562064).

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

40001136 is a wasteful number, since it uses less digits than its factorization.

40001136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 40001136 is about 6324.6451283847. The cubic root of 40001136 is about 341.9984268592.

The spelling of 40001136 in words is "forty million, one thousand, one hundred thirty-six".