28169461 has 2 divisors, whose sum is σ = 28169462. Its totient is φ = 28169460.

The previous prime is 28169437. The next prime is 28169473. The reversal of 28169461 is 16496182.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24068836 + 4100625 = 4906^2 + 2025^2 .

It is a cyclic number.

It is not a de Polignac number, because 28169461 - 2²³ = 19780853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28169461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28109461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14084730 + 14084731.

It is an arithmetic number, because the mean of its divisors is an integer number (14084731).

Almost surely, 2^28169461 is an apocalyptic number.

It is an amenable number.

28169461 is a deficient number, since it is larger than the sum of its proper divisors (1).

28169461 is an equidigital number, since it uses as much as digits as its factorization.

28169461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 37.

The square root of 28169461 is about 5307.4910268412. The cubic root of 28169461 is about 304.2702647630.

The spelling of 28169461 in words is "twenty-eight million, one hundred sixty-nine thousand, four hundred sixty-one".