28809934 has 32 divisors (see below), whose sum is σ = 48211200. Its totient is φ = 12848640.

The previous prime is 28809931. The next prime is 28809941. The reversal of 28809934 is 43990882.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28809931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59907 + ... + 60385.

It is an arithmetic number, because the mean of its divisors is an integer number (1506600).

Almost surely, 2^28809934 is an apocalyptic number.

28809934 is a deficient number, since it is larger than the sum of its proper divisors (19401266).

28809934 is a wasteful number, since it uses less digits than its factorization.

28809934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 28809934 is about 5367.4886120047. The cubic root of 28809934 is about 306.5590120445.

The spelling of 28809934 in words is "twenty-eight million, eight hundred nine thousand, nine hundred thirty-four".