278879232 has 88 divisors (see below), whose sum is σ = 775829376. Its totient is φ = 88895488.

The previous prime is 278879221. The next prime is 278879233. The reversal of 278879232 is 232978872.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278879233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68683 + ... + 72629.

Almost surely, 2^278879232 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 278879232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (387914688).

278879232 is an abundant number, since it is smaller than the sum of its proper divisors (496950144).

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

278879232 is a wasteful number, since it uses less digits than its factorization.

278879232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3993 (or 3975 counting only the distinct ones).

The product of its digits is 677376, while the sum is 48.

The square root of 278879232 is about 16699.6776016784. The cubic root of 278879232 is about 653.3392123123.

The spelling of 278879232 in words is "two hundred seventy-eight million, eight hundred seventy-nine thousand, two hundred thirty-two".