28164694 has 4 divisors (see below), whose sum is σ = 42247044. Its totient is φ = 14082346.

The previous prime is 28164691. The next prime is 28164749. The reversal of 28164694 is 49646182.

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

It is a super-2 number, since 2×28164694² = 1586499976227272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28164691) by changing a digit.

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, 7041172 + ... + 7041175.

It is an arithmetic number, because the mean of its divisors is an integer number (10561761).

Almost surely, 2^28164694 is an apocalyptic number.

28164694 is a deficient number, since it is larger than the sum of its proper divisors (14082350).

28164694 is a wasteful number, since it uses less digits than its factorization.

28164694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14082349.

The product of its digits is 82944, while the sum is 40.

The square root of 28164694 is about 5307.0419255928. The cubic root of 28164694 is about 304.2531003335.

The spelling of 28164694 in words is "twenty-eight million, one hundred sixty-four thousand, six hundred ninety-four".