278858247940 has 24 divisors (see below), whose sum is σ = 585664575552. Its totient is φ = 111531441120.

The previous prime is 278858247931. The next prime is 278858247977. The reversal of 278858247940 is 49742858872.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547056 + ... + 925735.

It is an arithmetic number, because the mean of its divisors is an integer number (24402690648).

Almost surely, 2^278858247940 is an apocalyptic number.

278858247940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

278858247940 is an abundant number, since it is smaller than the sum of its proper divisors (306806327612).

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

278858247940 is a wasteful number, since it uses less digits than its factorization.

278858247940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482267 (or 1482265 counting only the distinct ones).

The product of its (nonzero) digits is 72253440, while the sum is 64.

The spelling of 278858247940 in words is "two hundred seventy-eight billion, eight hundred fifty-eight million, two hundred forty-seven thousand, nine hundred forty".