40186668 has 24 divisors (see below), whose sum is σ = 94958080. Its totient is φ = 13225680.

The previous prime is 40186649. The next prime is 40186669. The reversal of 40186668 is 86668104.

It is a super-2 number, since 2×40186668² = 3229936569884448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40186669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20248 + ... + 22143.

Almost surely, 2^40186668 is an apocalyptic number.

It is an amenable number.

40186668 is an abundant number, since it is smaller than the sum of its proper divisors (54771412).

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

40186668 is a wasteful number, since it uses less digits than its factorization.

40186668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42477 (or 42475 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 40186668 is about 6339.2955444592. The cubic root of 40186668 is about 342.5263602352.

The spelling of 40186668 in words is "forty million, one hundred eighty-six thousand, six hundred sixty-eight".