28667412 has 48 divisors (see below), whose sum is σ = 76063680. Its totient is φ = 9332064.

The previous prime is 28667411. The next prime is 28667417. The reversal of 28667412 is 21476682.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28667411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1558 + ... + 7730.

It is an arithmetic number, because the mean of its divisors is an integer number (1584660).

Almost surely, 2^28667412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28667412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38031840).

28667412 is an abundant number, since it is smaller than the sum of its proper divisors (47396268).

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

28667412 is a wasteful number, since it uses less digits than its factorization.

28667412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6229 (or 6221 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 28667412 is about 5354.1957379237. The cubic root of 28667412 is about 306.0526629853.

The spelling of 28667412 in words is "twenty-eight million, six hundred sixty-seven thousand, four hundred twelve".