40256560 has 20 divisors (see below), whose sum is σ = 93596688. Its totient is φ = 16102592.

The previous prime is 40256549. The next prime is 40256591. The reversal of 40256560 is 6565204.

It is a tau number, because it is divible by the number of its divisors (20).

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, 251524 + ... + 251683.

Almost surely, 2^40256560 is an apocalyptic number.

40256560 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40256560 is an abundant number, since it is smaller than the sum of its proper divisors (53340128).

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

40256560 is a wasteful number, since it uses less digits than its factorization.

40256560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503220 (or 503214 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 40256560 is about 6344.8057495876. The cubic root of 40256560 is about 342.7248173218.

It can be divided in two parts, 4025 and 6560, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 40256560 in words is "forty million, two hundred fifty-six thousand, five hundred sixty".