278428966000 has 40 divisors (see below), whose sum is σ = 673241244624. Its totient is φ = 111371585600.

The previous prime is 278428965979. The next prime is 278428966027. The reversal of 278428966000 is 669824872.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69605242 + ... + 69609241.

Almost surely, 2^278428966000 is an apocalyptic number.

278428966000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

278428966000 is an abundant number, since it is smaller than the sum of its proper divisors (394812278624).

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

278428966000 is a wasteful number, since it uses less digits than its factorization.

278428966000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139214506 (or 139214490 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 278428966000 in words is "two hundred seventy-eight billion, four hundred twenty-eight million, nine hundred sixty-six thousand".