280270435720 has 128 divisors (see below), whose sum is σ = 704582115840. Its totient is φ = 99462922240.

The previous prime is 280270435681. The next prime is 280270435729. The reversal of 280270435720 is 27534072082.

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 (280270435729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7280844 + ... + 7319236.

It is an arithmetic number, because the mean of its divisors is an integer number (5504547780).

Almost surely, 2^280270435720 is an apocalyptic number.

280270435720 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 280270435720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352291057920).

280270435720 is an abundant number, since it is smaller than the sum of its proper divisors (424311680120).

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

280270435720 is a wasteful number, since it uses less digits than its factorization.

280270435720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38815 (or 38811 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 40.

The spelling of 280270435720 in words is "two hundred eighty billion, two hundred seventy million, four hundred thirty-five thousand, seven hundred twenty".