28328052 has 24 divisors (see below), whose sum is σ = 69987456. Its totient is φ = 8887168.

The previous prime is 28327979. The next prime is 28328063. The reversal of 28328052 is 25082382.

It is a super-2 number, since 2×28328052² = 1604957060229408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69228 + ... + 69635.

It is an arithmetic number, because the mean of its divisors is an integer number (2916144).

Almost surely, 2^28328052 is an apocalyptic number.

It is an amenable number.

28328052 is an abundant number, since it is smaller than the sum of its proper divisors (41659404).

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

28328052 is a wasteful number, since it uses less digits than its factorization.

28328052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138887 (or 138885 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 28328052 is about 5322.4103562202. The cubic root of 28328052 is about 304.8401993673.

The spelling of 28328052 in words is "twenty-eight million, three hundred twenty-eight thousand, fifty-two".