40144668 has 24 divisors (see below), whose sum is σ = 94147200. Its totient is φ = 13313520.

The previous prime is 40144639. The next prime is 40144679. The reversal of 40144668 is 86644104.

It is a super-2 number, since 2×40144668² = 3223188737660448, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6018 + ... + 10793.

It is an arithmetic number, because the mean of its divisors is an integer number (3922800).

Almost surely, 2^40144668 is an apocalyptic number.

It is an amenable number.

40144668 is an abundant number, since it is smaller than the sum of its proper divisors (54002532).

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

40144668 is a wasteful number, since it uses less digits than its factorization.

40144668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17017 (or 17015 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 40144668 is about 6335.9820075502. The cubic root of 40144668 is about 342.4069912794.

The spelling of 40144668 in words is "forty million, one hundred forty-four thousand, six hundred sixty-eight".