900856 has 32 divisors (see below), whose sum is σ = 1911600. Its totient is φ = 394240.

The previous prime is 900821. The next prime is 900863. The reversal of 900856 is 658009.

It is a congruent number.

It is an unprimeable number.

900856 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2376 + ... + 2728.

2⁹⁰⁰⁸⁵⁶ 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 900856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (955800).

900856 is an abundant number, since it is smaller than the sum of its proper divisors (1010744).

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

900856 is a wasteful number, since it uses less digits than its factorization.

900856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 900856 is about 949.1343424405. The cubic root of 900856 is about 96.5795383507.

The spelling of 900856 in words is "nine hundred thousand, eight hundred fifty-six".