28158948 has 48 divisors (see below), whose sum is σ = 73615360. Its totient is φ = 9307872.

The previous prime is 28158917. The next prime is 28158967. The reversal of 28158948 is 84985182.

It is a happy number.

28158948 is a `hidden beast` number, since 28 + 1 + 589 + 48 = 666.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12690 + ... + 14742.

Almost surely, 2^28158948 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28158948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36807680).

28158948 is an abundant number, since it is smaller than the sum of its proper divisors (45456412).

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

28158948 is a wasteful number, since it uses less digits than its factorization.

28158948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2193 (or 2185 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 28158948 is about 5306.5005417883. The cubic root of 28158948 is about 304.2324082664.

It can be divided in two parts, 28 and 158948, that multiplied together give a palindrome (4450544).

The spelling of 28158948 in words is "twenty-eight million, one hundred fifty-eight thousand, nine hundred forty-eight".