28825906 has 4 divisors (see below), whose sum is σ = 43238862. Its totient is φ = 14412952.

The previous prime is 28825903. The next prime is 28825921. The reversal of 28825906 is 60952882.

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

It can be written as a sum of positive squares in only one way, i.e., 16329681 + 12496225 = 4041^2 + 3535^2 .

It is not an unprimeable number, because it can be changed into a prime (28825903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7206475 + ... + 7206478.

Almost surely, 2^28825906 is an apocalyptic number.

28825906 is a deficient number, since it is larger than the sum of its proper divisors (14412956).

28825906 is a wasteful number, since it uses less digits than its factorization.

28825906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14412955.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 28825906 is about 5368.9762525085. The cubic root of 28825906 is about 306.6156528775.

The spelling of 28825906 in words is "twenty-eight million, eight hundred twenty-five thousand, nine hundred six".