285731712 has 320 divisors, whose sum is σ = 1011056640. Its totient is φ = 78382080.

The previous prime is 285731711. The next prime is 285731717. The reversal of 285731712 is 217137582.

It is a super-2 number, since 2×285731712² = 163285222484901888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285731711) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2249793 + ... + 2249919.

It is an arithmetic number, because the mean of its divisors is an integer number (3159552).

Almost surely, 2^285731712 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 285731712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (505528320).

285731712 is an abundant number, since it is smaller than the sum of its proper divisors (725324928).

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

285731712 is a wasteful number, since it uses less digits than its factorization.

285731712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 170 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 285731712 is about 16903.6005631936. The cubic root of 285731712 is about 658.6471461995.

The spelling of 285731712 in words is "two hundred eighty-five million, seven hundred thirty-one thousand, seven hundred twelve".