40344978 has 48 divisors (see below), whose sum is σ = 87531840. Its totient is φ = 12390144.

The previous prime is 40344971. The next prime is 40345001. The reversal of 40344978 is 87944304.

It is not an unprimeable number, because it can be changed into a prime (40344971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91683 + ... + 92121.

It is an arithmetic number, because the mean of its divisors is an integer number (1823580).

Almost surely, 2^40344978 is an apocalyptic number.

40344978 is an abundant number, since it is smaller than the sum of its proper divisors (47186862).

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

40344978 is a wasteful number, since it uses less digits than its factorization.

40344978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531 (or 514 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 40344978 is about 6351.7696746655. The cubic root of 40344978 is about 342.9755498272.

The spelling of 40344978 in words is "forty million, three hundred forty-four thousand, nine hundred seventy-eight".