856931328 has 264 divisors, whose sum is σ = 2759028480. Its totient is φ = 253992960.

The previous prime is 856931303. The next prime is 856931329. The reversal of 856931328 is 823139658.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (264).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856931329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8008651 + ... + 8008757.

Almost surely, 2^856931328 is an apocalyptic number.

856931328 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 856931328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1379514240).

856931328 is an abundant number, since it is smaller than the sum of its proper divisors (1902097152).

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

856931328 is a wasteful number, since it uses less digits than its factorization.

856931328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 202 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 856931328 is about 29273.3894176947. The cubic root of 856931328 is about 949.8361039512.

The spelling of 856931328 in words is "eight hundred fifty-six million, nine hundred thirty-one thousand, three hundred twenty-eight".