278945952 has 24 divisors (see below), whose sum is σ = 732233376. Its totient is φ = 92981952.

The previous prime is 278945917. The next prime is 278945957. The reversal of 278945952 is 259549872.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 278945895 and 278945904.

It is not an unprimeable number, because it can be changed into a prime (278945957) 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 3 ways as a sum of consecutive naturals, for example, 1452748 + ... + 1452939.

It is an arithmetic number, because the mean of its divisors is an integer number (30509724).

Almost surely, 2^278945952 is an apocalyptic number.

It is an amenable number.

278945952 is an abundant number, since it is smaller than the sum of its proper divisors (453287424).

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

278945952 is a wasteful number, since it uses less digits than its factorization.

278945952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2905700 (or 2905692 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 51.

The square root of 278945952 is about 16701.6751255675. The cubic root of 278945952 is about 653.3913105104.

The spelling of 278945952 in words is "two hundred seventy-eight million, nine hundred forty-five thousand, nine hundred fifty-two".