28091702 has 4 divisors (see below), whose sum is σ = 42137556. Its totient is φ = 14045850.

The previous prime is 28091677. The next prime is 28091711. The reversal of 28091702 is 20719082.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

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, 7022924 + ... + 7022927.

It is an arithmetic number, because the mean of its divisors is an integer number (10534389).

Almost surely, 2^28091702 is an apocalyptic number.

28091702 is a deficient number, since it is larger than the sum of its proper divisors (14045854).

28091702 is a wasteful number, since it uses less digits than its factorization.

28091702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14045853.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 28091702 is about 5300.1605636056. The cubic root of 28091702 is about 303.9900374736.

The spelling of 28091702 in words is "twenty-eight million, ninety-one thousand, seven hundred two".