280740798 has 48 divisors (see below), whose sum is σ = 656313840. Its totient is φ = 86216832.

The previous prime is 280740791. The next prime is 280740809. The reversal of 280740798 is 897047082.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280740791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 188565 + ... + 190047.

It is an arithmetic number, because the mean of its divisors is an integer number (13673205).

Almost surely, 2^280740798 is an apocalyptic number.

280740798 is an abundant number, since it is smaller than the sum of its proper divisors (375573042).

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

280740798 is a wasteful number, since it uses less digits than its factorization.

280740798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2313 (or 2310 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 280740798 is about 16755.3214830394. The cubic root of 280740798 is about 654.7897062022.

The spelling of 280740798 in words is "two hundred eighty million, seven hundred forty thousand, seven hundred ninety-eight".