28661612 has 24 divisors (see below), whose sum is σ = 57711360. Its totient is φ = 12200400.

The previous prime is 28661593. The next prime is 28661623. The reversal of 28661612 is 21616682.

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, 839 + ... + 7617.

It is an arithmetic number, because the mean of its divisors is an integer number (2404640).

Almost surely, 2^28661612 is an apocalyptic number.

It is an amenable number.

28661612 is an abundant number, since it is smaller than the sum of its proper divisors (29049748).

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

28661612 is a wasteful number, since it uses less digits than its factorization.

28661612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6941 (or 6939 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 28661612 is about 5353.6540792248. The cubic root of 28661612 is about 306.0320213688.

The spelling of 28661612 in words is "twenty-eight million, six hundred sixty-one thousand, six hundred twelve".