4278521280 has 168 divisors, whose sum is σ = 14931914256. Its totient is φ = 1037189120.

The previous prime is 4278521279. The next prime is 4278521281. The reversal of 4278521280 is 821258724.

It is an interprime number because it is at equal distance from previous prime (4278521279) and next prime (4278521281).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4278521281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97744 + ... + 134576.

It is an arithmetic number, because the mean of its divisors is an integer number (88880442).

Almost surely, 2^4278521280 is an apocalyptic number.

4278521280 is a gapful number since it is divisible by the number (40) 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 4278521280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7465957128).

4278521280 is an abundant number, since it is smaller than the sum of its proper divisors (10653392976).

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

4278521280 is a wasteful number, since it uses less digits than its factorization.

4278521280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36875 (or 36854 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 39.

The square root of 4278521280 is about 65410.4065115024. The cubic root of 4278521280 is about 1623.4212712977.

The spelling of 4278521280 in words is "four billion, two hundred seventy-eight million, five hundred twenty-one thousand, two hundred eighty".