280020430296 has 128 divisors (see below), whose sum is σ = 819161280000. Its totient is φ = 88385592960.

The previous prime is 280020430279. The next prime is 280020430307. The reversal of 280020430296 is 692034020082.

It is a super-2 number, since 2×280020430296² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 280020430296.

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, 9296941 + ... + 9327011.

It is an arithmetic number, because the mean of its divisors is an integer number (6399697500).

Almost surely, 2^280020430296 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 280020430296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (409580640000).

280020430296 is an abundant number, since it is smaller than the sum of its proper divisors (539140849704).

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

280020430296 is a wasteful number, since it uses less digits than its factorization.

280020430296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32374 (or 32364 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 280020430296 in words is "two hundred eighty billion, twenty million, four hundred thirty thousand, two hundred ninety-six".