278345452 has 48 divisors (see below), whose sum is σ = 612944640. Its totient is φ = 107438400.

The previous prime is 278345443. The next prime is 278345461. The reversal of 278345452 is 254543872.

It is an interprime number because it is at equal distance from previous prime (278345443) and next prime (278345461).

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29427 + ... + 37717.

It is an arithmetic number, because the mean of its divisors is an integer number (12769680).

Almost surely, 2^278345452 is an apocalyptic number.

278345452 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 278345452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306472320).

278345452 is an abundant number, since it is smaller than the sum of its proper divisors (334599188).

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

278345452 is a wasteful number, since it uses less digits than its factorization.

278345452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8422 (or 8420 counting only the distinct ones).

The product of its digits is 268800, while the sum is 40.

The square root of 278345452 is about 16683.6882013540. The cubic root of 278345452 is about 652.9221116471.

The spelling of 278345452 in words is "two hundred seventy-eight million, three hundred forty-five thousand, four hundred fifty-two".