278583870488 has 192 divisors, whose sum is σ = 669487161600. Its totient is φ = 107460622080.

The previous prime is 278583870431. The next prime is 278583870493. The reversal of 278583870488 is 884078385872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 213801245 + ... + 213802547.

It is an arithmetic number, because the mean of its divisors is an integer number (3486912300).

Almost surely, 2^278583870488 is an apocalyptic number.

278583870488 is a gapful number since it is divisible by the number (28) 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 278583870488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334743580800).

278583870488 is an abundant number, since it is smaller than the sum of its proper divisors (390903291112).

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

278583870488 is a wasteful number, since it uses less digits than its factorization.

278583870488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790 (or 1779 counting only the distinct ones).

The product of its (nonzero) digits is 192675840, while the sum is 68.

The spelling of 278583870488 in words is "two hundred seventy-eight billion, five hundred eighty-three million, eight hundred seventy thousand, four hundred eighty-eight".