28472148 has 30 divisors (see below), whose sum is σ = 74432666. Its totient is φ = 9490608.

The previous prime is 28472131. The next prime is 28472159. The reversal of 28472148 is 84127482.

It can be written as a sum of positive squares in only one way, i.e., 27060804 + 1411344 = 5202^2 + 1188^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 43615 + ... + 44262.

Almost surely, 2^28472148 is an apocalyptic number.

It is an amenable number.

28472148 is an abundant number, since it is smaller than the sum of its proper divisors (45960518).

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

28472148 is a wasteful number, since it uses less digits than its factorization.

28472148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87893 (or 87882 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 28472148 is about 5335.9299095846. The cubic root of 28472148 is about 305.3562012370.

The spelling of 28472148 in words is "twenty-eight million, four hundred seventy-two thousand, one hundred forty-eight".