40188736 has 56 divisors (see below), whose sum is σ = 92090240. Its totient is φ = 17044992.

The previous prime is 40188721. The next prime is 40188737. The reversal of 40188736 is 63788104.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 40188695 and 40188704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40188737) 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 7 ways as a sum of consecutive naturals, for example, 48421 + ... + 49243.

Almost surely, 2^40188736 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 40188736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46045120).

40188736 is an abundant number, since it is smaller than the sum of its proper divisors (51901504).

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

40188736 is a wasteful number, since it uses less digits than its factorization.

40188736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951 (or 941 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 40188736 is about 6339.4586519671. The cubic root of 40188736 is about 342.5322355864.

The spelling of 40188736 in words is "forty million, one hundred eighty-eight thousand, seven hundred thirty-six".