278378496 has 144 divisors (see below), whose sum is σ = 877738680. Its totient is φ = 84295680.

The previous prime is 278378483. The next prime is 278378521. The reversal of 278378496 is 694873872.

278378496 is a `hidden beast` number, since 2 + 7 + 83 + 78 + 496 = 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 11 ways as a sum of consecutive naturals, for example, 202066 + ... + 203438.

Almost surely, 2^278378496 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 278378496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (438869340).

278378496 is an abundant number, since it is smaller than the sum of its proper divisors (599360184).

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

278378496 is a wasteful number, since it uses less digits than its factorization.

278378496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412 (or 1389 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The square root of 278378496 is about 16684.6784805701. The cubic root of 278378496 is about 652.9479480127.

The spelling of 278378496 in words is "two hundred seventy-eight million, three hundred seventy-eight thousand, four hundred ninety-six".