280145743284 has 96 divisors (see below), whose sum is σ = 745099407360. Its totient is φ = 81092880000.

The previous prime is 280145743223. The next prime is 280145743301. The reversal of 280145743284 is 482347541082.

It is a super-2 number, since 2×280145743284² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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, 2218602 + ... + 2341470.

It is an arithmetic number, because the mean of its divisors is an integer number (7761452160).

Almost surely, 2^280145743284 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 280145743284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (372549703680).

280145743284 is an abundant number, since it is smaller than the sum of its proper divisors (464953664076).

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

280145743284 is a wasteful number, since it uses less digits than its factorization.

280145743284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123661 (or 123659 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 48.

The spelling of 280145743284 in words is "two hundred eighty billion, one hundred forty-five million, seven hundred forty-three thousand, two hundred eighty-four".