28807234 has 4 divisors (see below), whose sum is σ = 43210854. Its totient is φ = 14403616.

The previous prime is 28807223. The next prime is 28807241. The reversal of 28807234 is 43270882.

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., 28249225 + 558009 = 5315^2 + 747^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28807234.

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 as a sum of consecutive naturals, namely, 7201807 + ... + 7201810.

Almost surely, 2^28807234 is an apocalyptic number.

28807234 is a deficient number, since it is larger than the sum of its proper divisors (14403620).

28807234 is a wasteful number, since it uses less digits than its factorization.

28807234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14403619.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 28807234 is about 5367.2370918378. The cubic root of 28807234 is about 306.5494350795.

The spelling of 28807234 in words is "twenty-eight million, eight hundred seven thousand, two hundred thirty-four".