28597212 has 96 divisors (see below), whose sum is σ = 85962240. Its totient is φ = 8153136.

The previous prime is 28597207. The next prime is 28597237. The reversal of 28597212 is 21279582.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61003 + ... + 61469.

It is an arithmetic number, because the mean of its divisors is an integer number (895440).

Almost surely, 2^28597212 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 28597212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42981120).

28597212 is an abundant number, since it is smaller than the sum of its proper divisors (57365028).

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

28597212 is an equidigital number, since it uses as much as digits as its factorization.

28597212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499 (or 479 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 28597212 is about 5347.6361132747. The cubic root of 28597212 is about 305.8026409039.

The spelling of 28597212 in words is "twenty-eight million, five hundred ninety-seven thousand, two hundred twelve".