28232761 has 4 divisors (see below), whose sum is σ = 28283472. Its totient is φ = 28182052.

The previous prime is 28232749. The next prime is 28232773. The reversal of 28232761 is 16723282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16723282 = 2 ⋅8361641.

It is an interprime number because it is at equal distance from previous prime (28232749) and next prime (28232773).

It is a cyclic number.

It is not a de Polignac number, because 28232761 - 2⁹ = 28232249 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28232791) 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, 24511 + ... + 25636.

It is an arithmetic number, because the mean of its divisors is an integer number (7070868).

Almost surely, 2^28232761 is an apocalyptic number.

It is an amenable number.

28232761 is a deficient number, since it is larger than the sum of its proper divisors (50711).

28232761 is an equidigital number, since it uses as much as digits as its factorization.

28232761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50710.

The product of its digits is 8064, while the sum is 31.

The square root of 28232761 is about 5313.4509501829. The cubic root of 28232761 is about 304.4980042884.

The spelling of 28232761 in words is "twenty-eight million, two hundred thirty-two thousand, seven hundred sixty-one".