285168380 has 48 divisors (see below), whose sum is σ = 706492416. Its totient is φ = 94616640.

The previous prime is 285168277. The next prime is 285168383. The reversal of 285168380 is 83861582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285168383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28514 + ... + 37193.

It is an arithmetic number, because the mean of its divisors is an integer number (14718592).

Almost surely, 2^285168380 is an apocalyptic number.

285168380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285168380 is an abundant number, since it is smaller than the sum of its proper divisors (421324036).

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

285168380 is a wasteful number, since it uses less digits than its factorization.

285168380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65754 (or 65752 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 285168380 is about 16886.9292649670. The cubic root of 285168380 is about 658.2140113107.

The spelling of 285168380 in words is "two hundred eighty-five million, one hundred sixty-eight thousand, three hundred eighty".