28761137 has 2 divisors, whose sum is σ = 28761138. Its totient is φ = 28761136.

The previous prime is 28761113. The next prime is 28761163. The reversal of 28761137 is 73116782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25090081 + 3671056 = 5009^2 + 1916^2 .

It is a cyclic number.

It is not a de Polignac number, because 28761137 - 2⁸ = 28760881 is a prime.

It is equal to p_1785806 and since 28761137 and 1785806 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 28761097 and 28761106.

It is not a weakly prime, because it can be changed into another prime (28761167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14380568 + 14380569.

It is an arithmetic number, because the mean of its divisors is an integer number (14380569).

Almost surely, 2^28761137 is an apocalyptic number.

It is an amenable number.

28761137 is a deficient number, since it is larger than the sum of its proper divisors (1).

28761137 is an equidigital number, since it uses as much as digits as its factorization.

28761137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 35.

The square root of 28761137 is about 5362.9410774313. The cubic root of 28761137 is about 306.3858355077.

The spelling of 28761137 in words is "twenty-eight million, seven hundred sixty-one thousand, one hundred thirty-seven".