856507484 has 24 divisors (see below), whose sum is σ = 1742052480. Its totient is φ = 360852336.

The previous prime is 856507471. The next prime is 856507499. The reversal of 856507484 is 484705658.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257582 + ... + 260885.

It is an arithmetic number, because the mean of its divisors is an integer number (72585520).

Almost surely, 2^856507484 is an apocalyptic number.

It is an amenable number.

856507484 is an abundant number, since it is smaller than the sum of its proper divisors (885544996).

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

856507484 is a wasteful number, since it uses less digits than its factorization.

856507484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518537 (or 518535 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 47.

The square root of 856507484 is about 29266.1491146341. The cubic root of 856507484 is about 949.6794796835.

The spelling of 856507484 in words is "eight hundred fifty-six million, five hundred seven thousand, four hundred eighty-four".