280978490442 has 24 divisors (see below), whose sum is σ = 608509632384. Its totient is φ = 86454919824.

The previous prime is 280978490437. The next prime is 280978490447. The reversal of 280978490442 is 244094879082.

It is an interprime number because it is at equal distance from previous prime (280978490437) and next prime (280978490447).

It is not an unprimeable number, because it can be changed into a prime (280978490447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138548538 + ... + 138550565.

It is an arithmetic number, because the mean of its divisors is an integer number (25354568016).

Almost surely, 2^280978490442 is an apocalyptic number.

280978490442 is an abundant number, since it is smaller than the sum of its proper divisors (327531141942).

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

280978490442 is a wasteful number, since it uses less digits than its factorization.

280978490442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277099134 (or 277099121 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 57.

The spelling of 280978490442 in words is "two hundred eighty billion, nine hundred seventy-eight million, four hundred ninety thousand, four hundred forty-two".