28662948 has 18 divisors (see below), whose sum is σ = 72453654. Its totient is φ = 9554304.

The previous prime is 28662947. The next prime is 28662973. The reversal of 28662948 is 84926682.

It can be written as a sum of positive squares in only one way, i.e., 28643904 + 19044 = 5352^2 + 138^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28662947) 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 5 ways as a sum of consecutive naturals, for example, 398061 + ... + 398132.

It is an arithmetic number, because the mean of its divisors is an integer number (4025203).

Almost surely, 2^28662948 is an apocalyptic number.

It is an amenable number.

28662948 is an abundant number, since it is smaller than the sum of its proper divisors (43790706).

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

28662948 is a wasteful number, since it uses less digits than its factorization.

28662948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796203 (or 796198 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 28662948 is about 5353.7788523621. The cubic root of 28662948 is about 306.0367763053.

It can be divided in two parts, 28 and 662948, that added together give a triangular number (662976 = T₁₁₅₁).

The spelling of 28662948 in words is "twenty-eight million, six hundred sixty-two thousand, nine hundred forty-eight".