28125806 has 16 divisors (see below), whose sum is σ = 42892416. Its totient is φ = 13830456.

The previous prime is 28125793. The next prime is 28125841. The reversal of 28125806 is 60852182.

It is a super-3 number, since 3×28125806³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35345 + ... + 36131.

It is an arithmetic number, because the mean of its divisors is an integer number (2680776).

Almost surely, 2^28125806 is an apocalyptic number.

28125806 is a deficient number, since it is larger than the sum of its proper divisors (14766610).

28125806 is a wasteful number, since it uses less digits than its factorization.

28125806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 28125806 is about 5303.3768487634. The cubic root of 28125806 is about 304.1130047908.

Adding to 28125806 its reverse (60852182), we get a palindrome (88977988).

The spelling of 28125806 in words is "twenty-eight million, one hundred twenty-five thousand, eight hundred six".