28069234 has 4 divisors (see below), whose sum is σ = 42103854. Its totient is φ = 14034616.

The previous prime is 28069183. The next prime is 28069259. The reversal of 28069234 is 43296082.

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., 28058209 + 11025 = 5297^2 + 105^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28069234.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7017307 + ... + 7017310.

Almost surely, 2^28069234 is an apocalyptic number.

28069234 is a deficient number, since it is larger than the sum of its proper divisors (14034620).

28069234 is a wasteful number, since it uses less digits than its factorization.

28069234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14034619.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 28069234 is about 5298.0405811960. The cubic root of 28069234 is about 303.9089711872.

The spelling of 28069234 in words is "twenty-eight million, sixty-nine thousand, two hundred thirty-four".