285589980 has 216 divisors, whose sum is σ = 971582976. Its totient is φ = 67495680.

The previous prime is 285589963. The next prime is 285589991. The reversal of 285589980 is 89985582.

285589980 is a `hidden beast` number, since 2 + 8 + 558 + 9 + 9 + 80 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2248677 + ... + 2248803.

Almost surely, 2^285589980 is an apocalyptic number.

285589980 is a gapful number since it is divisible by the number (20) 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 285589980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (485791488).

285589980 is an abundant number, since it is smaller than the sum of its proper divisors (685992996).

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

285589980 is a wasteful number, since it uses less digits than its factorization.

285589980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 54.

The square root of 285589980 is about 16899.4076819278. The cubic root of 285589980 is about 658.5382248900.

The spelling of 285589980 in words is "two hundred eighty-five million, five hundred eighty-nine thousand, nine hundred eighty".