278244613920 has 384 divisors, whose sum is σ = 1088648225280. Its totient is φ = 58166968320.

The previous prime is 278244613903. The next prime is 278244613987. The reversal of 278244613920 is 29316442872.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 278244613920.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4731900 + ... + 4790340.

It is an arithmetic number, because the mean of its divisors is an integer number (2835021420).

Almost surely, 2^278244613920 is an apocalyptic number.

278244613920 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 278244613920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (544324112640).

278244613920 is an abundant number, since it is smaller than the sum of its proper divisors (810403611360).

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

278244613920 is a wasteful number, since it uses less digits than its factorization.

278244613920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58588 (or 58580 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

The spelling of 278244613920 in words is "two hundred seventy-eight billion, two hundred forty-four million, six hundred thirteen thousand, nine hundred twenty".