285355280 has 40 divisors (see below), whose sum is σ = 758231232. Its totient is φ = 97835904.

The previous prime is 285355253. The next prime is 285355289. The reversal of 285355280 is 82553582.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (285355289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254222 + ... + 255341.

Almost surely, 2^285355280 is an apocalyptic number.

285355280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285355280 is an abundant number, since it is smaller than the sum of its proper divisors (472875952).

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

285355280 is a wasteful number, since it uses less digits than its factorization.

285355280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509583 (or 509577 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 38.

The square root of 285355280 is about 16892.4622243177. The cubic root of 285355280 is about 658.3577782232.

The spelling of 285355280 in words is "two hundred eighty-five million, three hundred fifty-five thousand, two hundred eighty".