278249472 has 240 divisors, whose sum is σ = 896505120. Its totient is φ = 84934656.

The previous prime is 278249443. The next prime is 278249473. The reversal of 278249472 is 274942872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278249473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7520238 + ... + 7520274.

It is an arithmetic number, because the mean of its divisors is an integer number (3735438).

Almost surely, 2^278249472 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 278249472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448252560).

278249472 is an abundant number, since it is smaller than the sum of its proper divisors (618255648).

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

278249472 is an equidigital number, since it uses as much as digits as its factorization.

278249472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91 (or 59 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 278249472 is about 16680.8114910516. The cubic root of 278249472 is about 652.8470554316.

The spelling of 278249472 in words is "two hundred seventy-eight million, two hundred forty-nine thousand, four hundred seventy-two".