278399904480 has 144 divisors (see below), whose sum is σ = 980686272384. Its totient is φ = 71845125120.

The previous prime is 278399904463. The next prime is 278399904499. The reversal of 278399904480 is 84409993872.

278399904480 is a `hidden beast` number, since 2 + 78 + 39 + 9 + 90 + 448 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3073639 + ... + 3162918.

It is an arithmetic number, because the mean of its divisors is an integer number (6810321336).

Almost surely, 2^278399904480 is an apocalyptic number.

278399904480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

278399904480 is an abundant number, since it is smaller than the sum of its proper divisors (702286367904).

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

278399904480 is a wasteful number, since it uses less digits than its factorization.

278399904480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6236609 (or 6236598 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The spelling of 278399904480 in words is "two hundred seventy-eight billion, three hundred ninety-nine million, nine hundred four thousand, four hundred eighty".