2231635728 has 80 divisors (see below), whose sum is σ = 6935429120. Its totient is φ = 604050048.

The previous prime is 2231635667. The next prime is 2231635733. The reversal of 2231635728 is 8275361322.

It is a super-3 number, since 3×2231635728³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168400 + ... + 181167.

It is an arithmetic number, because the mean of its divisors is an integer number (86692864).

Almost surely, 2^2231635728 is an apocalyptic number.

2231635728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2231635728 is an abundant number, since it is smaller than the sum of its proper divisors (4703793392).

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

2231635728 is a wasteful number, since it uses less digits than its factorization.

2231635728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349604 (or 349598 counting only the distinct ones).

The product of its digits is 120960, while the sum is 39.

The square root of 2231635728 is about 47240.1918709059. The cubic root of 2231635728 is about 1306.7959161102.

The spelling of 2231635728 in words is "two billion, two hundred thirty-one million, six hundred thirty-five thousand, seven hundred twenty-eight".