40556736 has 168 divisors, whose sum is σ = 130996944. Its totient is φ = 11888640.

The previous prime is 40556731. The next prime is 40556743. The reversal of 40556736 is 63765504.

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

It is a self number, because there is not a number n which added to its sum of digits gives 40556736.

It is not an unprimeable number, because it can be changed into a prime (40556731) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 234346 + ... + 234518.

Almost surely, 2^40556736 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 40556736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65498472).

40556736 is an abundant number, since it is smaller than the sum of its proper divisors (90440208).

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

40556736 is a wasteful number, since it uses less digits than its factorization.

40556736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

The square root of 40556736 is about 6368.4170717691. The cubic root of 40556736 is about 343.5745596876.

The spelling of 40556736 in words is "forty million, five hundred fifty-six thousand, seven hundred thirty-six".