15641228 has 12 divisors (see below), whose sum is σ = 27419952. Its totient is φ = 7806960.

The previous prime is 15641221. The next prime is 15641233. The reversal of 15641228 is 82214651.

It is a self number, because there is not a number n which added to its sum of digits gives 15641228.

It is not an unprimeable number, because it can be changed into a prime (15641221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 575 + ... + 5622.

It is an arithmetic number, because the mean of its divisors is an integer number (2284996).

Almost surely, 2^15641228 is an apocalyptic number.

It is an amenable number.

15641228 is a deficient number, since it is larger than the sum of its proper divisors (11778724).

15641228 is a wasteful number, since it uses less digits than its factorization.

15641228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6832 (or 6830 counting only the distinct ones).

The product of its digits is 3840, while the sum is 29.

The square root of 15641228 is about 3954.8992401830. The cubic root of 15641228 is about 250.0865193875.

Adding to 15641228 its reverse (82214651), we get a palindrome (97855879).

The spelling of 15641228 in words is "fifteen million, six hundred forty-one thousand, two hundred twenty-eight".