856529240 has 32 divisors (see below), whose sum is σ = 2202504480. Its totient is φ = 293667072.

The previous prime is 856529231. The next prime is 856529251. The reversal of 856529240 is 42925658.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1529237 + ... + 1529796.

It is an arithmetic number, because the mean of its divisors is an integer number (68828265).

Almost surely, 2^856529240 is an apocalyptic number.

It is an amenable number.

856529240 is an abundant number, since it is smaller than the sum of its proper divisors (1345975240).

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

856529240 is a wasteful number, since it uses less digits than its factorization.

856529240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3059051 (or 3059047 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 856529240 is about 29266.5208044960. The cubic root of 856529240 is about 949.6875204974.

The spelling of 856529240 in words is "eight hundred fifty-six million, five hundred twenty-nine thousand, two hundred forty".