40865580 has 192 divisors, whose sum is σ = 153216000. Its totient is φ = 8833536.

The previous prime is 40865563. The next prime is 40865623. The reversal of 40865580 is 8556804.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 71536 + ... + 72104.

It is an arithmetic number, because the mean of its divisors is an integer number (798000).

Almost surely, 2^40865580 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 40865580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76608000).

40865580 is an abundant number, since it is smaller than the sum of its proper divisors (112350420).

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

40865580 is a wasteful number, since it uses less digits than its factorization.

40865580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613 (or 605 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 40865580 is about 6392.6191815249. The cubic root of 40865580 is about 344.4444745828. Note that the first 4 decimals are identical.

The spelling of 40865580 in words is "forty million, eight hundred sixty-five thousand, five hundred eighty".