28058617 has 4 divisors (see below), whose sum is σ = 28816996. Its totient is φ = 27300240.

The previous prime is 28058609. The next prime is 28058629. The reversal of 28058617 is 71685082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11215801 + 16842816 = 3349^2 + 4104^2 .

It is a cyclic number.

It is not a de Polignac number, because 28058617 - 2³ = 28058609 is a prime.

It is a super-3 number, since 3×28058617³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 758341 = 28058617 / (2 + 8 + 0 + 5 + 8 + 6 + 1 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28058647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 379134 + ... + 379207.

It is an arithmetic number, because the mean of its divisors is an integer number (7204249).

Almost surely, 2^28058617 is an apocalyptic number.

It is an amenable number.

28058617 is a deficient number, since it is larger than the sum of its proper divisors (758379).

28058617 is an equidigital number, since it uses as much as digits as its factorization.

28058617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758378.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 28058617 is about 5297.0385122255. The cubic root of 28058617 is about 303.8706491766.

The spelling of 28058617 in words is "twenty-eight million, fifty-eight thousand, six hundred seventeen".