40256580 has 192 divisors, whose sum is σ = 142023168. Its totient is φ = 8294400.

The previous prime is 40256549. The next prime is 40256591. The reversal of 40256580 is 8565204.

40256580 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 398530 + ... + 398630.

It is an arithmetic number, because the mean of its divisors is an integer number (739704).

Almost surely, 2^40256580 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 40256580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71011584).

40256580 is an abundant number, since it is smaller than the sum of its proper divisors (101766588).

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

40256580 is a wasteful number, since it uses less digits than its factorization.

40256580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 40256580 is about 6344.8073256798. The cubic root of 40256580 is about 342.7248740786.

The spelling of 40256580 in words is "forty million, two hundred fifty-six thousand, five hundred eighty".