280002745480 has 32 divisors (see below), whose sum is σ = 630865733400. Its totient is φ = 111848288256.

The previous prime is 280002745469. The next prime is 280002745487. The reversal of 280002745480 is 84547200082.

It can be written as a sum of positive squares in 4 ways, for example, as 220372035844 + 59630709636 = 469438^2 + 244194^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (280002745487) 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, 4745625 + ... + 4804264.

Almost surely, 2^280002745480 is an apocalyptic number.

280002745480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280002745480 is an abundant number, since it is smaller than the sum of its proper divisors (350862987920).

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

280002745480 is a wasteful number, since it uses less digits than its factorization.

280002745480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9550633 (or 9550629 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 40.

The spelling of 280002745480 in words is "two hundred eighty billion, two million, seven hundred forty-five thousand, four hundred eighty".