28364057 has 4 divisors (see below), whose sum is σ = 28381440. Its totient is φ = 28346676.

The previous prime is 28364027. The next prime is 28364071. The reversal of 28364057 is 75046382.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28364057 - 2¹⁰ = 28363033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28364027) 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, 5957 + ... + 9602.

It is an arithmetic number, because the mean of its divisors is an integer number (7095360).

Almost surely, 2^28364057 is an apocalyptic number.

It is an amenable number.

28364057 is a deficient number, since it is larger than the sum of its proper divisors (17383).

28364057 is a wasteful number, since it uses less digits than its factorization.

28364057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17382.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 28364057 is about 5325.7916782390. The cubic root of 28364057 is about 304.9692954847.

The spelling of 28364057 in words is "twenty-eight million, three hundred sixty-four thousand, fifty-seven".