280881338 has 4 divisors (see below), whose sum is σ = 421322010. Its totient is φ = 140440668.

The previous prime is 280881323. The next prime is 280881343. The reversal of 280881338 is 833188082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 279458089 + 1423249 = 16717^2 + 1193^2 .

It is a junction number, because it is equal to n+sod(n) for n = 280881295 and 280881304.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70220333 + ... + 70220336.

Almost surely, 2^280881338 is an apocalyptic number.

280881338 is a deficient number, since it is larger than the sum of its proper divisors (140440672).

280881338 is a wasteful number, since it uses less digits than its factorization.

280881338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140440671.

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 280881338 is about 16759.5148497801. The cubic root of 280881338 is about 654.8989514494.

The spelling of 280881338 in words is "two hundred eighty million, eight hundred eighty-one thousand, three hundred thirty-eight".