28811252 has 6 divisors (see below), whose sum is σ = 50419698. Its totient is φ = 14405624.

The previous prime is 28811219. The next prime is 28811257. The reversal of 28811252 is 25211882.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 25140196 + 3671056 = 5014^2 + 1916^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28811257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3601403 + ... + 3601410.

It is an arithmetic number, because the mean of its divisors is an integer number (8403283).

Almost surely, 2^28811252 is an apocalyptic number.

It is an amenable number.

28811252 is a deficient number, since it is larger than the sum of its proper divisors (21608446).

28811252 is a wasteful number, since it uses less digits than its factorization.

28811252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7202817 (or 7202815 counting only the distinct ones).

The product of its digits is 2560, while the sum is 29.

The square root of 28811252 is about 5367.6113868275. The cubic root of 28811252 is about 306.5636868049.

The spelling of 28811252 in words is "twenty-eight million, eight hundred eleven thousand, two hundred fifty-two".