40181900 has 36 divisors (see below), whose sum is σ = 95124120. Its totient is φ = 14611200.

The previous prime is 40181887. The next prime is 40181917. The reversal of 40181900 is 918104.

It is a super-2 number, since 2×40181900² = 3229170175220000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17165 + ... + 19364.

Almost surely, 2^40181900 is an apocalyptic number.

It is an amenable number.

40181900 is an abundant number, since it is smaller than the sum of its proper divisors (54942220).

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

40181900 is a wasteful number, since it uses less digits than its factorization.

40181900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36554 (or 36547 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 40181900 is about 6338.9194662813. The cubic root of 40181900 is about 342.5128132028.

The spelling of 40181900 in words is "forty million, one hundred eighty-one thousand, nine hundred".