278722080 has 384 divisors, whose sum is σ = 1202342400. Its totient is φ = 58724352.

The previous prime is 278722069. The next prime is 278722091. The reversal of 278722080 is 80227872.

It is an interprime number because it is at equal distance from previous prime (278722069) and next prime (278722091).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 392766 + ... + 393474.

It is an arithmetic number, because the mean of its divisors is an integer number (3131100).

Almost surely, 2^278722080 is an apocalyptic number.

278722080 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 278722080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (601171200).

278722080 is an abundant number, since it is smaller than the sum of its proper divisors (923620320).

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

278722080 is a wasteful number, since it uses less digits than its factorization.

278722080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753 (or 739 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 278722080 is about 16694.9716980892. The cubic root of 278722080 is about 653.2164675969.

The spelling of 278722080 in words is "two hundred seventy-eight million, seven hundred twenty-two thousand, eighty".