28638152 has 8 divisors (see below), whose sum is σ = 53696550. Its totient is φ = 14319072.

The previous prime is 28638139. The next prime is 28638157. The reversal of 28638152 is 25183682.

It can be written as a sum of positive squares in only one way, i.e., 17522596 + 11115556 = 4186^2 + 3334^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (28638157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1789877 + ... + 1789892.

Almost surely, 2^28638152 is an apocalyptic number.

It is an amenable number.

28638152 is a deficient number, since it is larger than the sum of its proper divisors (25058398).

28638152 is a wasteful number, since it uses less digits than its factorization.

28638152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3579775 (or 3579771 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 28638152 is about 5351.4626038122. The cubic root of 28638152 is about 305.9485011658.

The spelling of 28638152 in words is "twenty-eight million, six hundred thirty-eight thousand, one hundred fifty-two".