28164742 has 32 divisors (see below), whose sum is σ = 46759680. Its totient is φ = 12677280.

The previous prime is 28164691. The next prime is 28164749. The reversal of 28164742 is 24746182.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28164698 and 28164707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28164749) 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, 57117 + ... + 57607.

It is an arithmetic number, because the mean of its divisors is an integer number (1461240).

Almost surely, 2^28164742 is an apocalyptic number.

28164742 is a deficient number, since it is larger than the sum of its proper divisors (18594938).

28164742 is a wasteful number, since it uses less digits than its factorization.

28164742 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 digits is 21504, while the sum is 34.

The square root of 28164742 is about 5307.0464478842. The cubic root of 28164742 is about 304.2532731757.

The spelling of 28164742 in words is "twenty-eight million, one hundred sixty-four thousand, seven hundred forty-two".