40188916 has 6 divisors (see below), whose sum is σ = 70330610. Its totient is φ = 20094456.

The previous prime is 40188881. The next prime is 40188917. The reversal of 40188916 is 61988104.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 33686416 + 6502500 = 5804^2 + 2550^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40188917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5023611 + ... + 5023618.

Almost surely, 2^40188916 is an apocalyptic number.

It is an amenable number.

40188916 is a deficient number, since it is larger than the sum of its proper divisors (30141694).

40188916 is a wasteful number, since it uses less digits than its factorization.

40188916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10047233 (or 10047231 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 40188916 is about 6339.4728487470. The cubic root of 40188916 is about 342.5327469710.

The spelling of 40188916 in words is "forty million, one hundred eighty-eight thousand, nine hundred sixteen".