840245256 has 48 divisors (see below), whose sum is σ = 2284114560. Its totient is φ = 279041760.

The previous prime is 840245233. The next prime is 840245261. The reversal of 840245256 is 652542048.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 840245256.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2020 + ... + 41043.

It is an arithmetic number, because the mean of its divisors is an integer number (47585720).

Almost surely, 2^840245256 is an apocalyptic number.

It is an amenable number.

840245256 is an abundant number, since it is smaller than the sum of its proper divisors (1443869304).

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

840245256 is a wasteful number, since it uses less digits than its factorization.

840245256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43346 (or 43339 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The square root of 840245256 is about 28986.9842515568. The cubic root of 840245256 is about 943.6306159177.

The spelling of 840245256 in words is "eight hundred forty million, two hundred forty-five thousand, two hundred fifty-six".