28333906 has 8 divisors (see below), whose sum is σ = 43302924. Its totient is φ = 13899600.

The previous prime is 28333901. The next prime is 28333933. The reversal of 28333906 is 60933382.

It can be written as a sum of positive squares in 2 ways, for example, as 28249225 + 84681 = 5315^2 + 291^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28333901) 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, 133545 + ... + 133756.

Almost surely, 2^28333906 is an apocalyptic number.

28333906 is a deficient number, since it is larger than the sum of its proper divisors (14969018).

28333906 is a wasteful number, since it uses less digits than its factorization.

28333906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267356.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 28333906 is about 5322.9602666186. The cubic root of 28333906 is about 304.8611963589.

The spelling of 28333906 in words is "twenty-eight million, three hundred thirty-three thousand, nine hundred six".