278963588442 has 288 divisors, whose sum is σ = 735309937152. Its totient is φ = 70253568000.

The previous prime is 278963588437. The next prime is 278963588471. The reversal of 278963588442 is 244885369872.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 281496567 + ... + 281497557.

It is an arithmetic number, because the mean of its divisors is an integer number (2553159504).

Almost surely, 2^278963588442 is an apocalyptic number.

278963588442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 278963588442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367654968576).

278963588442 is an abundant number, since it is smaller than the sum of its proper divisors (456346348710).

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

278963588442 is a wasteful number, since it uses less digits than its factorization.

278963588442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266 (or 1248 counting only the distinct ones).

The product of its digits is 185794560, while the sum is 66.

The spelling of 278963588442 in words is "two hundred seventy-eight billion, nine hundred sixty-three million, five hundred eighty-eight thousand, four hundred forty-two".