2231110728 has 384 divisors, whose sum is σ = 7907328000. Its totient is φ = 563068800.

The previous prime is 2231110709. The next prime is 2231110729. The reversal of 2231110728 is 8270111322.

It is a super-3 number, since 3×2231110728³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2231110729) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11681113 + ... + 11681303.

It is an arithmetic number, because the mean of its divisors is an integer number (20592000).

Almost surely, 2^2231110728 is an apocalyptic number.

2231110728 is a gapful number since it is divisible by the number (28) 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 2231110728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3953664000).

2231110728 is an abundant number, since it is smaller than the sum of its proper divisors (5676217272).

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

2231110728 is a wasteful number, since it uses less digits than its factorization.

2231110728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 2231110728 is about 47234.6348350445. The cubic root of 2231110728 is about 1306.6934319914.

The spelling of 2231110728 in words is "two billion, two hundred thirty-one million, one hundred ten thousand, seven hundred twenty-eight".