278961472 has 28 divisors (see below), whose sum is σ = 564015636. Its totient is φ = 136847360.

The previous prime is 278961443. The next prime is 278961493. The reversal of 278961472 is 274169872.

278961472 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 159365376 + 119596096 = 12624^2 + 10936^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37729 + ... + 44512.

Almost surely, 2^278961472 is an apocalyptic number.

It is an amenable number.

278961472 is an abundant number, since it is smaller than the sum of its proper divisors (285054164).

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

278961472 is an equidigital number, since it uses as much as digits as its factorization.

278961472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82306 (or 82296 counting only the distinct ones).

The product of its digits is 338688, while the sum is 46.

The square root of 278961472 is about 16702.1397431587. The cubic root of 278961472 is about 653.4034280849.

It can be divided in two parts, 2789 and 61472, that added together give a triangular number (64261 = T₃₅₈).

The spelling of 278961472 in words is "two hundred seventy-eight million, nine hundred sixty-one thousand, four hundred seventy-two".