285938856 has 128 divisors (see below), whose sum is σ = 912326400. Its totient is φ = 81285120.

The previous prime is 285938837. The next prime is 285938881. The reversal of 285938856 is 658839582.

It is a super-2 number, since 2×285938856² = 163522058741177472, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 424536 + ... + 425208.

It is an arithmetic number, because the mean of its divisors is an integer number (7127550).

Almost surely, 2^285938856 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 285938856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (456163200).

285938856 is an abundant number, since it is smaller than the sum of its proper divisors (626387544).

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

285938856 is a wasteful number, since it uses less digits than its factorization.

285938856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976 (or 966 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 54.

The square root of 285938856 is about 16909.7266684001. The cubic root of 285938856 is about 658.8062719832.

The spelling of 285938856 in words is "two hundred eighty-five million, nine hundred thirty-eight thousand, eight hundred fifty-six".