28735169 has 8 divisors (see below), whose sum is σ = 29365632. Its totient is φ = 28108080.

The previous prime is 28735141. The next prime is 28735193. The reversal of 28735169 is 96153782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28735169 is a prime.

It is a super-2 number, since 2×28735169² = 1651419874917122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28735129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23954 + ... + 25124.

It is an arithmetic number, because the mean of its divisors is an integer number (3670704).

Almost surely, 2^28735169 is an apocalyptic number.

It is an amenable number.

28735169 is a deficient number, since it is larger than the sum of its proper divisors (630463).

28735169 is a wasteful number, since it uses less digits than its factorization.

28735169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687.

The product of its digits is 90720, while the sum is 41.

The square root of 28735169 is about 5360.5194710961. The cubic root of 28735169 is about 306.2935973473.

The spelling of 28735169 in words is "twenty-eight million, seven hundred thirty-five thousand, one hundred sixty-nine".