856187484 has 12 divisors (see below), whose sum is σ = 1997770824. Its totient is φ = 285395824.

The previous prime is 856187483. The next prime is 856187539. The reversal of 856187484 is 484781658.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856187483) 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, 35674467 + ... + 35674490.

It is an arithmetic number, because the mean of its divisors is an integer number (166480902).

Almost surely, 2^856187484 is an apocalyptic number.

It is an amenable number.

856187484 is an abundant number, since it is smaller than the sum of its proper divisors (1141583340).

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

856187484 is a wasteful number, since it uses less digits than its factorization.

856187484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71348964 (or 71348962 counting only the distinct ones).

The product of its digits is 1720320, while the sum is 51.

The square root of 856187484 is about 29260.6815368337. The cubic root of 856187484 is about 949.5611949464.

The spelling of 856187484 in words is "eight hundred fifty-six million, one hundred eighty-seven thousand, four hundred eighty-four".