28321596 has 24 divisors (see below), whose sum is σ = 73426640. Its totient is φ = 9440496.

The previous prime is 28321577. The next prime is 28321607. The reversal of 28321596 is 69512382.

It is a super-2 number, since 2×28321596² = 1604225599974432, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28321596.

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, 131011 + ... + 131226.

Almost surely, 2^28321596 is an apocalyptic number.

It is an amenable number.

28321596 is an abundant number, since it is smaller than the sum of its proper divisors (45105044).

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

28321596 is a wasteful number, since it uses less digits than its factorization.

28321596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262250 (or 262242 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 28321596 is about 5321.8038295300. The cubic root of 28321596 is about 304.8170397815.

The spelling of 28321596 in words is "twenty-eight million, three hundred twenty-one thousand, five hundred ninety-six".