28747906 has 24 divisors (see below), whose sum is σ = 47707632. Its totient is φ = 12982200.

The previous prime is 28747843. The next prime is 28747913. The reversal of 28747906 is 60974782.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50781 + ... + 51343.

It is an arithmetic number, because the mean of its divisors is an integer number (1987818).

Almost surely, 2^28747906 is an apocalyptic number.

28747906 is a deficient number, since it is larger than the sum of its proper divisors (18959726).

28747906 is a wasteful number, since it uses less digits than its factorization.

28747906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798 (or 787 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 28747906 is about 5361.7073773193. The cubic root of 28747906 is about 306.3388460258.

The spelling of 28747906 in words is "twenty-eight million, seven hundred forty-seven thousand, nine hundred six".