280828075 has 48 divisors (see below), whose sum is σ = 406045440. Its totient is φ = 190512000.

The previous prime is 280828073. The next prime is 280828099. The reversal of 280828075 is 570828082.

It is not a de Polignac number, because 280828075 - 2¹ = 280828073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (280828073) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 370597 + ... + 371353.

It is an arithmetic number, because the mean of its divisors is an integer number (8459280).

Almost surely, 2^280828075 is an apocalyptic number.

280828075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

280828075 is a deficient number, since it is larger than the sum of its proper divisors (125217365).

280828075 is a wasteful number, since it uses less digits than its factorization.

280828075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868 (or 863 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 40.

The square root of 280828075 is about 16757.9257367969. The cubic root of 280828075 is about 654.8575530803.

The spelling of 280828075 in words is "two hundred eighty million, eight hundred twenty-eight thousand, seventy-five".