28336761 has 12 divisors (see below), whose sum is σ = 41109588. Its totient is φ = 18808704.

The previous prime is 28336753. The next prime is 28336787. The reversal of 28336761 is 16763382.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10112400 + 18224361 = 3180^2 + 4269^2 .

It is not a de Polignac number, because 28336761 - 2³ = 28336753 is a prime.

It is a super-2 number, since 2×28336761² = 1605944047942242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28336751) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4660 + ... + 8853.

It is an arithmetic number, because the mean of its divisors is an integer number (3425799).

Almost surely, 2^28336761 is an apocalyptic number.

It is an amenable number.

28336761 is a deficient number, since it is larger than the sum of its proper divisors (12772827).

28336761 is a wasteful number, since it uses less digits than its factorization.

28336761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13752 (or 13749 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 28336761 is about 5323.2284377058. The cubic root of 28336761 is about 304.8714355577.

The spelling of 28336761 in words is "twenty-eight million, three hundred thirty-six thousand, seven hundred sixty-one".