40442668 has 24 divisors (see below), whose sum is σ = 81799200. Its totient is φ = 17136768.

The previous prime is 40442653. The next prime is 40442669. The reversal of 40442668 is 86624404.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (40442669) 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, 5623 + ... + 10606.

It is an arithmetic number, because the mean of its divisors is an integer number (3408300).

Almost surely, 2^40442668 is an apocalyptic number.

It is an amenable number.

40442668 is an abundant number, since it is smaller than the sum of its proper divisors (41356532).

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

40442668 is a wasteful number, since it uses less digits than its factorization.

40442668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16329 (or 16327 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

The square root of 40442668 is about 6359.4550080962. The cubic root of 40442668 is about 343.2521499278.

The spelling of 40442668 in words is "forty million, four hundred forty-two thousand, six hundred sixty-eight".