278401879960 has 16 divisors (see below), whose sum is σ = 626404230000. Its totient is φ = 111360751968.

The previous prime is 278401879939. The next prime is 278401879981. The reversal of 278401879960 is 69978104872.

It is an interprime number because it is at equal distance from previous prime (278401879939) and next prime (278401879981).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3480023460 + ... + 3480023539.

It is an arithmetic number, because the mean of its divisors is an integer number (39150264375).

Almost surely, 2^278401879960 is an apocalyptic number.

278401879960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

278401879960 is an abundant number, since it is smaller than the sum of its proper divisors (348002350040).

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

278401879960 is a wasteful number, since it uses less digits than its factorization.

278401879960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6960047010 (or 6960047006 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 61.

The spelling of 278401879960 in words is "two hundred seventy-eight billion, four hundred one million, eight hundred seventy-nine thousand, nine hundred sixty".