278055478 has 32 divisors (see below), whose sum is σ = 435746304. Its totient is φ = 132985632.

The previous prime is 278055473. The next prime is 278055511. The reversal of 278055478 is 874550872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278055473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1224801 + ... + 1225027.

It is an arithmetic number, because the mean of its divisors is an integer number (13617072).

Almost surely, 2^278055478 is an apocalyptic number.

278055478 is a deficient number, since it is larger than the sum of its proper divisors (157690826).

278055478 is a wasteful number, since it uses less digits than its factorization.

278055478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516.

The product of its (nonzero) digits is 627200, while the sum is 46.

The square root of 278055478 is about 16674.9955922033. The cubic root of 278055478 is about 652.6952997007.

The spelling of 278055478 in words is "two hundred seventy-eight million, fifty-five thousand, four hundred seventy-eight".