280328696100 has 720 divisors, whose sum is σ = 1023140764800. Its totient is φ = 65975316480.

The previous prime is 280328696059. The next prime is 280328696107. The reversal of 280328696100 is 1696823082.

280328696100 is a `hidden beast` number, since 2 + 8 + 0 + 3 + 28 + 6 + 9 + 610 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (280328696107) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 285176209 + ... + 285177191.

It is an arithmetic number, because the mean of its divisors is an integer number (1421028840).

Almost surely, 2^280328696100 is an apocalyptic number.

280328696100 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 280328696100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (511570382400).

280328696100 is an abundant number, since it is smaller than the sum of its proper divisors (742812068700).

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

280328696100 is a wasteful number, since it uses less digits than its factorization.

280328696100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154 (or 1138 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 280328696100 in words is "two hundred eighty billion, three hundred twenty-eight million, six hundred ninety-six thousand, one hundred".