40188836 has 12 divisors (see below), whose sum is σ = 71294412. Its totient is φ = 19819008.

The previous prime is 40188829. The next prime is 40188839. The reversal of 40188836 is 63888104.

40188836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 31427236 + 8761600 = 5606^2 + 2960^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 40188836.

It is not an unprimeable number, because it can be changed into a prime (40188839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68525 + ... + 69108.

It is an arithmetic number, because the mean of its divisors is an integer number (5941201).

Almost surely, 2^40188836 is an apocalyptic number.

It is an amenable number.

40188836 is a deficient number, since it is larger than the sum of its proper divisors (31105576).

40188836 is a wasteful number, since it uses less digits than its factorization.

40188836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137710 (or 137708 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 40188836 is about 6339.4665390709. The cubic root of 40188836 is about 342.5325196891.

The spelling of 40188836 in words is "forty million, one hundred eighty-eight thousand, eight hundred thirty-six".