280107828 has 192 divisors, whose sum is σ = 975421440. Its totient is φ = 67132800.

The previous prime is 280107787. The next prime is 280107833. The reversal of 280107828 is 828701082.

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

It is a junction number, because it is equal to n+sod(n) for n = 280107792 and 280107801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 106813 + ... + 109403.

It is an arithmetic number, because the mean of its divisors is an integer number (5080320).

Almost surely, 2^280107828 is an apocalyptic number.

280107828 is a gapful number since it is divisible by the number (28) 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 280107828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (487710720).

280107828 is an abundant number, since it is smaller than the sum of its proper divisors (695313612).

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

280107828 is a wasteful number, since it uses less digits than its factorization.

280107828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2635 (or 2627 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 280107828 is about 16736.4221983075. The cubic root of 280107828 is about 654.2972304356.

The spelling of 280107828 in words is "two hundred eighty million, one hundred seven thousand, eight hundred twenty-eight".