40040168 has 64 divisors (see below), whose sum is σ = 91808640. Its totient is φ = 15980544.

The previous prime is 40040153. The next prime is 40040177. The reversal of 40040168 is 86104004.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130271 + ... + 130577.

It is an arithmetic number, because the mean of its divisors is an integer number (1434510).

Almost surely, 2^40040168 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 40040168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45904320).

40040168 is an abundant number, since it is smaller than the sum of its proper divisors (51768472).

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

40040168 is a wasteful number, since it uses less digits than its factorization.

40040168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 40040168 is about 6327.7300827390. The cubic root of 40040168 is about 342.1096282271.

The spelling of 40040168 in words is "forty million, forty thousand, one hundred sixty-eight".