28028948 has 24 divisors (see below), whose sum is σ = 50783040. Its totient is φ = 13527360.

The previous prime is 28028921. The next prime is 28028969. The reversal of 28028948 is 84982082.

It is a super-3 number, since 3×28028948³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

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 in 7 ways as a sum of consecutive naturals, for example, 14393 + ... + 16223.

It is an arithmetic number, because the mean of its divisors is an integer number (2115960).

Almost surely, 2^28028948 is an apocalyptic number.

It is an amenable number.

28028948 is a deficient number, since it is larger than the sum of its proper divisors (22754092).

28028948 is a wasteful number, since it uses less digits than its factorization.

28028948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1967 (or 1965 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 28028948 is about 5294.2372444007. The cubic root of 28028948 is about 303.7635077850.

The spelling of 28028948 in words is "twenty-eight million, twenty-eight thousand, nine hundred forty-eight".