28671612 has 24 divisors (see below), whose sum is σ = 66995712. Its totient is φ = 9543600.

The previous prime is 28671611. The next prime is 28671619. The reversal of 28671612 is 21617682.

It is a super-2 number, since 2×28671612² = 1644122669357088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28671611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10687 + ... + 13097.

It is an arithmetic number, because the mean of its divisors is an integer number (2791488).

Almost surely, 2^28671612 is an apocalyptic number.

It is an amenable number.

28671612 is an abundant number, since it is smaller than the sum of its proper divisors (38324100).

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

28671612 is a wasteful number, since it uses less digits than its factorization.

28671612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3409 (or 3407 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 28671612 is about 5354.5879393283. The cubic root of 28671612 is about 306.0676086248.

The spelling of 28671612 in words is "twenty-eight million, six hundred seventy-one thousand, six hundred twelve".