278315974420 has 288 divisors, whose sum is σ = 713810361600. Its totient is φ = 90649405440.

The previous prime is 278315974373. The next prime is 278315974421. The reversal of 278315974420 is 24479513872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278315974421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 94119582 + ... + 94122538.

It is an arithmetic number, because the mean of its divisors is an integer number (2478508200).

Almost surely, 2^278315974420 is an apocalyptic number.

278315974420 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 278315974420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (356905180800).

278315974420 is an abundant number, since it is smaller than the sum of its proper divisors (435494387180).

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

278315974420 is a wasteful number, since it uses less digits than its factorization.

278315974420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3119 (or 3106 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 278315974420 in words is "two hundred seventy-eight billion, three hundred fifteen million, nine hundred seventy-four thousand, four hundred twenty".