856487400 has 48 divisors (see below), whose sum is σ = 2655112800. Its totient is φ = 228396480.

The previous prime is 856487383. The next prime is 856487419. The reversal of 856487400 is 4784658.

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, 713140 + ... + 714339.

It is an arithmetic number, because the mean of its divisors is an integer number (55314850).

Almost surely, 2^856487400 is an apocalyptic number.

It is an amenable number.

856487400 is an abundant number, since it is smaller than the sum of its proper divisors (1798625400).

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

856487400 is a wasteful number, since it uses less digits than its factorization.

856487400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427498 (or 1427489 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 856487400 is about 29265.8059858258. The cubic root of 856487400 is about 949.6720567043.

The spelling of 856487400 in words is "eight hundred fifty-six million, four hundred eighty-seven thousand, four hundred".