285036880 has 20 divisors (see below), whose sum is σ = 662710932. Its totient is φ = 114014720.

The previous prime is 285036859. The next prime is 285036887. The reversal of 285036880 is 88630582.

It can be written as a sum of positive squares in 2 ways, for example, as 206324496 + 78712384 = 14364^2 + 8872^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285036887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1781401 + ... + 1781560.

Almost surely, 2^285036880 is an apocalyptic number.

285036880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285036880 is an abundant number, since it is smaller than the sum of its proper divisors (377674052).

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

285036880 is a wasteful number, since it uses less digits than its factorization.

285036880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3562974 (or 3562968 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 285036880 is about 16883.0352721304. The cubic root of 285036880 is about 658.1128214449.

The spelling of 285036880 in words is "two hundred eighty-five million, thirty-six thousand, eight hundred eighty".