280540998 has 12 divisors (see below), whose sum is σ = 607838868. Its totient is φ = 93513660.

The previous prime is 280540973. The next prime is 280540999. The reversal of 280540998 is 899045082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280540999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7792788 + ... + 7792823.

It is an arithmetic number, because the mean of its divisors is an integer number (50653239).

Almost surely, 2^280540998 is an apocalyptic number.

280540998 is an abundant number, since it is smaller than the sum of its proper divisors (327297870).

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

280540998 is a wasteful number, since it uses less digits than its factorization.

280540998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15585619 (or 15585616 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 280540998 is about 16749.3581369556. The cubic root of 280540998 is about 654.6343339008.

The spelling of 280540998 in words is "two hundred eighty million, five hundred forty thousand, nine hundred ninety-eight".