1210229728 has 24 divisors (see below), whose sum is σ = 2522796192. Its totient is φ = 569519616.

The previous prime is 1210229717. The next prime is 1210229729. The reversal of 1210229728 is 8279220121.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 1210229693 and 1210229702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210229729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1111800 + ... + 1112887.

It is an arithmetic number, because the mean of its divisors is an integer number (105116508).

Almost surely, 2^1210229728 is an apocalyptic number.

It is an amenable number.

1210229728 is an abundant number, since it is smaller than the sum of its proper divisors (1312566464).

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

1210229728 is a wasteful number, since it uses less digits than its factorization.

1210229728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2224714 (or 2224706 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 1210229728 is about 34788.3562129630. The cubic root of 1210229728 is about 1065.6696701495.

Adding to 1210229728 its reverse (8279220121), we get a palindrome (9489449849).

The spelling of 1210229728 in words is "one billion, two hundred ten million, two hundred twenty-nine thousand, seven hundred twenty-eight".