278047875840 has 288 divisors, whose sum is σ = 1059002090496. Its totient is φ = 60790456320.

The previous prime is 278047875821. The next prime is 278047875857. The reversal of 278047875840 is 48578740872.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 393370 + ... + 843110.

It is an arithmetic number, because the mean of its divisors is an integer number (3677090592).

Almost surely, 2^278047875840 is an apocalyptic number.

278047875840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 278047875840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (529501045248).

278047875840 is an abundant number, since it is smaller than the sum of its proper divisors (780954214656).

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

278047875840 is a wasteful number, since it uses less digits than its factorization.

278047875840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449795 (or 449781 counting only the distinct ones).

The product of its (nonzero) digits is 28098560, while the sum is 60.

The spelling of 278047875840 in words is "two hundred seventy-eight billion, forty-seven million, eight hundred seventy-five thousand, eight hundred forty".