278961456 has 40 divisors (see below), whose sum is σ = 724333104. Its totient is φ = 92512000.

The previous prime is 278961443. The next prime is 278961493. The reversal of 278961456 is 654169872.

278961456 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5295 + ... + 24206.

Almost surely, 2^278961456 is an apocalyptic number.

It is an amenable number.

278961456 is an abundant number, since it is smaller than the sum of its proper divisors (445371648).

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

278961456 is a wasteful number, since it uses less digits than its factorization.

278961456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29709 (or 29703 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The square root of 278961456 is about 16702.1392641781. The cubic root of 278961456 is about 653.4034155928.

The spelling of 278961456 in words is "two hundred seventy-eight million, nine hundred sixty-one thousand, four hundred fifty-six".