280981460520 has 480 divisors, whose sum is σ = 1021480475400. Its totient is φ = 69186991104.

The previous prime is 280981460471. The next prime is 280981460533. The reversal of 280981460520 is 25064189082.

280981460520 is a `hidden beast` number, since 2 + 8 + 0 + 9 + 8 + 14 + 605 + 20 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 256361967684 + 24619492836 = 506322^2 + 156906^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 49702014 + ... + 49707666.

Almost surely, 2^280981460520 is an apocalyptic number.

280981460520 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 280981460520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (510740237700).

280981460520 is an abundant number, since it is smaller than the sum of its proper divisors (740499014880).

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

280981460520 is a wasteful number, since it uses less digits than its factorization.

280981460520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5751 (or 5715 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 280981460520 in words is "two hundred eighty billion, nine hundred eighty-one million, four hundred sixty thousand, five hundred twenty".