28664232 has 16 divisors (see below), whose sum is σ = 71660640. Its totient is φ = 9554736.

The previous prime is 28664231. The next prime is 28664239. The reversal of 28664232 is 23246682.

It is a super-2 number, since 2×28664232² = 1643276392299648, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 28664193 and 28664202.

It is not an unprimeable number, because it can be changed into a prime (28664231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 597148 + ... + 597195.

It is an arithmetic number, because the mean of its divisors is an integer number (4478790).

Almost surely, 2^28664232 is an apocalyptic number.

It is an amenable number.

28664232 is an abundant number, since it is smaller than the sum of its proper divisors (42996408).

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

28664232 is a wasteful number, since it uses less digits than its factorization.

28664232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194352 (or 1194348 counting only the distinct ones).

The product of its digits is 27648, while the sum is 33.

The square root of 28664232 is about 5353.8987663197. The cubic root of 28664232 is about 306.0413460301.

The spelling of 28664232 in words is "twenty-eight million, six hundred sixty-four thousand, two hundred thirty-two".