278989872 has 40 divisors (see below), whose sum is σ = 823685376. Its totient is φ = 79711296.

The previous prime is 278989861. The next prime is 278989877.

278989872 is nontrivially palindromic in base 10.

278989872 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (278989877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 414828 + ... + 415499.

Almost surely, 2^278989872 is an apocalyptic number.

It is an amenable number.

278989872 is an abundant number, since it is smaller than the sum of its proper divisors (544695504).

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

278989872 is a wasteful number, since it uses less digits than its factorization.

278989872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830345 (or 830339 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 60.

The square root of 278989872 is about 16702.9899119888. The cubic root of 278989872 is about 653.4256008334.

The spelling of 278989872 in words is "two hundred seventy-eight million, nine hundred eighty-nine thousand, eight hundred seventy-two".