40178984 has 16 divisors (see below), whose sum is σ = 76939200. Its totient is φ = 19661872.

The previous prime is 40178917. The next prime is 40178989. The reversal of 40178984 is 48987104.

It is a happy number.

It is a super-2 number, since 2×40178984² = 3228701510544512, which contains 22 as substring.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (40178989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53054 + ... + 53805.

It is an arithmetic number, because the mean of its divisors is an integer number (4808700).

Almost surely, 2^40178984 is an apocalyptic number.

It is an amenable number.

40178984 is a deficient number, since it is larger than the sum of its proper divisors (36760216).

40178984 is a wasteful number, since it uses less digits than its factorization.

40178984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106912 (or 106908 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 40178984 is about 6338.6894544535. The cubic root of 40178984 is about 342.5045276188.

The spelling of 40178984 in words is "forty million, one hundred seventy-eight thousand, nine hundred eighty-four".