28740169 has 2 divisors, whose sum is σ = 28740170. Its totient is φ = 28740168.

The previous prime is 28740113. The next prime is 28740191. The reversal of 28740169 is 96104782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25130169 + 3610000 = 5013^2 + 1900^2 .

It is a cyclic number.

It is not a de Polignac number, because 28740169 - 2¹¹ = 28738121 is a prime.

It is a super-2 number, since 2×28740169² = 1651994628297122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28740269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14370084 + 14370085.

It is an arithmetic number, because the mean of its divisors is an integer number (14370085).

Almost surely, 2^28740169 is an apocalyptic number.

It is an amenable number.

28740169 is a deficient number, since it is larger than the sum of its proper divisors (1).

28740169 is an equidigital number, since it uses as much as digits as its factorization.

28740169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 28740169 is about 5360.9858235216. The cubic root of 28740169 is about 306.3113616320.

The spelling of 28740169 in words is "twenty-eight million, seven hundred forty thousand, one hundred sixty-nine".