28752232 has 16 divisors (see below), whose sum is σ = 54274500. Its totient is φ = 14279040.

The previous prime is 28752211. The next prime is 28752239. The reversal of 28752232 is 23225782.

It can be written as a sum of positive squares in 2 ways, for example, as 25745476 + 3006756 = 5074^2 + 1734^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28752194 and 28752203.

It is not an unprimeable number, because it can be changed into a prime (28752239) 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, 10869 + ... + 13252.

Almost surely, 2^28752232 is an apocalyptic number.

It is an amenable number.

28752232 is a deficient number, since it is larger than the sum of its proper divisors (25522268).

28752232 is a wasteful number, since it uses less digits than its factorization.

28752232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24276 (or 24272 counting only the distinct ones).

The product of its digits is 13440, while the sum is 31.

The square root of 28752232 is about 5362.1107784155. The cubic root of 28752232 is about 306.3542112653.

The spelling of 28752232 in words is "twenty-eight million, seven hundred fifty-two thousand, two hundred thirty-two".