28667312 has 40 divisors (see below), whose sum is σ = 59341440. Its totient is φ = 13386240.

The previous prime is 28667297. The next prime is 28667351. The reversal of 28667312 is 21376682.

28667312 = T₉₃ + T₉₄ + ... + T₅₅₆.

It is a happy 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, 13388 + ... + 15380.

It is an arithmetic number, because the mean of its divisors is an integer number (1483536).

Almost surely, 2^28667312 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 28667312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29670720).

28667312 is an abundant number, since it is smaller than the sum of its proper divisors (30674128).

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

28667312 is a wasteful number, since it uses less digits than its factorization.

28667312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061 (or 2055 counting only the distinct ones).

The product of its digits is 24192, while the sum is 35.

The square root of 28667312 is about 5354.1863994448. The cubic root of 28667312 is about 306.0523071190.

The spelling of 28667312 in words is "twenty-eight million, six hundred sixty-seven thousand, three hundred twelve".