278987472 has 60 divisors (see below), whose sum is σ = 783230500. Its totient is φ = 92703744.

The previous prime is 278987461. The next prime is 278987479. The reversal of 278987472 is 274789872.

It can be written as a sum of positive squares in 2 ways, for example, as 30735936 + 248251536 = 5544^2 + 15756^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278987479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45654 + ... + 51402.

Almost surely, 2^278987472 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 278987472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (391615250).

278987472 is an abundant number, since it is smaller than the sum of its proper divisors (504243028).

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

278987472 is a wasteful number, since it uses less digits than its factorization.

278987472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6100 (or 6091 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 54.

The square root of 278987472 is about 16702.9180684095. The cubic root of 278987472 is about 653.4237271382.

The spelling of 278987472 in words is "two hundred seventy-eight million, nine hundred eighty-seven thousand, four hundred seventy-two".