278725872 has 40 divisors (see below), whose sum is σ = 737609040. Its totient is φ = 90641920.

The previous prime is 278725861. The next prime is 278725879. The reversal of 278725872 is 278527872.

It is a super-2 number, since 2×278725872² = 155376223444320768, which contains 22 as substring.

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

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 (278725879) 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, 68847 + ... + 72782.

It is an arithmetic number, because the mean of its divisors is an integer number (18440226).

Almost surely, 2^278725872 is an apocalyptic number.

It is an amenable number.

278725872 is an abundant number, since it is smaller than the sum of its proper divisors (458883168).

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

278725872 is a wasteful number, since it uses less digits than its factorization.

278725872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141681 (or 141675 counting only the distinct ones).

The product of its digits is 878080, while the sum is 48.

The square root of 278725872 is about 16695.0852648317. The cubic root of 278725872 is about 653.2194299093.

The spelling of 278725872 in words is "two hundred seventy-eight million, seven hundred twenty-five thousand, eight hundred seventy-two".