40605920 has 24 divisors (see below), whose sum is σ = 95931864. Its totient is φ = 16242304.

The previous prime is 40605919. The next prime is 40605937. The reversal of 40605920 is 2950604.

It is a self number, because there is not a number n which added to its sum of digits gives 40605920.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126734 + ... + 127053.

It is an arithmetic number, because the mean of its divisors is an integer number (3997161).

Almost surely, 2^40605920 is an apocalyptic number.

40605920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40605920 is an abundant number, since it is smaller than the sum of its proper divisors (55325944).

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

40605920 is a wasteful number, since it uses less digits than its factorization.

40605920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253802 (or 253794 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 40605920 is about 6372.2774578639. The cubic root of 40605920 is about 343.7133902609.

The spelling of 40605920 in words is "forty million, six hundred five thousand, nine hundred twenty".