4028257280 has 66 divisors (see below), whose sum is σ = 9674003274. Its totient is φ = 1609486336.

The previous prime is 4028257231. The next prime is 4028257313. The reversal of 4028257280 is 827528204.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3222605824 + 805651456 = 56768^2 + 28384^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4540997 + ... + 4541883.

Almost surely, 2^4028257280 is an apocalyptic number.

4028257280 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 4028257280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4837001637).

4028257280 is an abundant number, since it is smaller than the sum of its proper divisors (5645745994).

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

4028257280 is an frugal number, since it uses more digits than its factorization.

4028257280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799 (or 894 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 38.

The square root of 4028257280 is about 63468.5534733540. The cubic root of 4028257280 is about 1591.1302539463.

The spelling of 4028257280 in words is "four billion, twenty-eight million, two hundred fifty-seven thousand, two hundred eighty".