285206873280 has 224 divisors, whose sum is σ = 1054421121024. Its totient is φ = 63960059904.

The previous prime is 285206873257. The next prime is 285206873291. The reversal of 285206873280 is 82378602582.

It is a tau number, because it is divible by the number of its divisors (224).

It is a super-3 number, since 3×285206873280³ (a number of 35 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44232 + ... + 756551.

Almost surely, 2^285206873280 is an apocalyptic number.

285206873280 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 285206873280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (527210560512).

285206873280 is an abundant number, since it is smaller than the sum of its proper divisors (769214247744).

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

285206873280 is a wasteful number, since it uses less digits than its factorization.

285206873280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800863 (or 800853 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 51.

The spelling of 285206873280 in words is "two hundred eighty-five billion, two hundred six million, eight hundred seventy-three thousand, two hundred eighty".