28625851 has 4 divisors (see below), whose sum is σ = 29029104. Its totient is φ = 28222600.

The previous prime is 28625843. The next prime is 28625879. The reversal of 28625851 is 15852682.

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

It is a cyclic number.

It is not a de Polignac number, because 28625851 - 2³ = 28625843 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28625851.

It is not an unprimeable number, because it can be changed into a prime (28625801) 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, 201520 + ... + 201661.

It is an arithmetic number, because the mean of its divisors is an integer number (7257276).

Almost surely, 2^28625851 is an apocalyptic number.

28625851 is a deficient number, since it is larger than the sum of its proper divisors (403253).

28625851 is an equidigital number, since it uses as much as digits as its factorization.

28625851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403252.

The product of its digits is 38400, while the sum is 37.

The square root of 28625851 is about 5350.3131684043. The cubic root of 28625851 is about 305.9046900115.

The spelling of 28625851 in words is "twenty-eight million, six hundred twenty-five thousand, eight hundred fifty-one".