28658948 has 6 divisors (see below), whose sum is σ = 50153166. Its totient is φ = 14329472.

The previous prime is 28658939. The next prime is 28658953. The reversal of 28658948 is 84985682.

It can be written as a sum of positive squares in only one way, i.e., 14760964 + 13897984 = 3842^2 + 3728^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28658896 and 28658905.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3582365 + ... + 3582372.

It is an arithmetic number, because the mean of its divisors is an integer number (8358861).

Almost surely, 2^28658948 is an apocalyptic number.

It is an amenable number.

28658948 is a deficient number, since it is larger than the sum of its proper divisors (21494218).

28658948 is a wasteful number, since it uses less digits than its factorization.

28658948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7164741 (or 7164739 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 50.

The square root of 28658948 is about 5353.4052714137. The cubic root of 28658948 is about 306.0225395276.

The spelling of 28658948 in words is "twenty-eight million, six hundred fifty-eight thousand, nine hundred forty-eight".