2256808240 has 20 divisors (see below), whose sum is σ = 5247079344. Its totient is φ = 902723264.

The previous prime is 2256808219. The next prime is 2256808241. The reversal of 2256808240 is 428086522.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2256808240.

It is not an unprimeable number, because it can be changed into a prime (2256808241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14104972 + ... + 14105131.

Almost surely, 2^2256808240 is an apocalyptic number.

2256808240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2256808240 is an abundant number, since it is smaller than the sum of its proper divisors (2990271104).

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

2256808240 is a wasteful number, since it uses less digits than its factorization.

2256808240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28210116 (or 28210110 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 2256808240 is about 47505.8758470992. The cubic root of 2256808240 is about 1311.6910430301.

The spelling of 2256808240 in words is "two billion, two hundred fifty-six million, eight hundred eight thousand, two hundred forty".