856947276 has 144 divisors (see below), whose sum is σ = 2322247200. Its totient is φ = 276203520.

The previous prime is 856947251. The next prime is 856947293. The reversal of 856947276 is 672749658.

856947276 is a `hidden beast` number, since 8 + 569 + 4 + 7 + 2 + 76 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5751250 + ... + 5751398.

Almost surely, 2^856947276 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 856947276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1161123600).

856947276 is an abundant number, since it is smaller than the sum of its proper divisors (1465299924).

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

856947276 is a wasteful number, since it uses less digits than its factorization.

856947276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326 (or 312 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The square root of 856947276 is about 29273.6618139925. The cubic root of 856947276 is about 949.8419962523.

The spelling of 856947276 in words is "eight hundred fifty-six million, nine hundred forty-seven thousand, two hundred seventy-six".