285922820 has 12 divisors (see below), whose sum is σ = 600437964. Its totient is φ = 114369120.

The previous prime is 285922801. The next prime is 285922831. The reversal of 285922820 is 28229582.

It can be written as a sum of positive squares in 2 ways, for example, as 64032004 + 221890816 = 8002^2 + 14896^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7148051 + ... + 7148090.

It is an arithmetic number, because the mean of its divisors is an integer number (50036497).

Almost surely, 2^285922820 is an apocalyptic number.

285922820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285922820 is an abundant number, since it is smaller than the sum of its proper divisors (314515144).

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

285922820 is a wasteful number, since it uses less digits than its factorization.

285922820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14296150 (or 14296148 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 285922820 is about 16909.2524967841. The cubic root of 285922820 is about 658.7939560461.

The spelling of 285922820 in words is "two hundred eighty-five million, nine hundred twenty-two thousand, eight hundred twenty".