28293906 has 16 divisors (see below), whose sum is σ = 57792384. Its totient is φ = 9230544.

The previous prime is 28293827. The next prime is 28293911. The reversal of 28293906 is 60939282.

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, 49885 + ... + 50448.

It is an arithmetic number, because the mean of its divisors is an integer number (3612024).

Almost surely, 2^28293906 is an apocalyptic number.

28293906 is an abundant number, since it is smaller than the sum of its proper divisors (29498478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28293906 is a wasteful number, since it uses less digits than its factorization.

28293906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100385.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 28293906 is about 5319.2016318241. The cubic root of 28293906 is about 304.7176676034.

The spelling of 28293906 in words is "twenty-eight million, two hundred ninety-three thousand, nine hundred six".