285657996 has 72 divisors (see below), whose sum is σ = 731297280. Its totient is φ = 86733504.

The previous prime is 285657973. The next prime is 285658003. The reversal of 285657996 is 699756582.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159321 + ... + 161103.

Almost surely, 2^285657996 is an apocalyptic number.

285657996 is a gapful number since it is divisible by the number (26) 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 285657996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (365648640).

285657996 is an abundant number, since it is smaller than the sum of its proper divisors (445639284).

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

285657996 is a wasteful number, since it uses less digits than its factorization.

285657996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1895 (or 1880 counting only the distinct ones).

The product of its digits is 8164800, while the sum is 57.

The square root of 285657996 is about 16901.4199403482. The cubic root of 285657996 is about 658.5904998106.

The spelling of 285657996 in words is "two hundred eighty-five million, six hundred fifty-seven thousand, nine hundred ninety-six".