28664742 has 16 divisors (see below), whose sum is σ = 57401712. Its totient is φ = 9542880.

The previous prime is 28664729. The next prime is 28664767. The reversal of 28664742 is 24746682.

It is a self number, because there is not a number n which added to its sum of digits gives 28664742.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3108 + ... + 8184.

It is an arithmetic number, because the mean of its divisors is an integer number (3587607).

Almost surely, 2^28664742 is an apocalyptic number.

28664742 is an abundant number, since it is smaller than the sum of its proper divisors (28736970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28664742 is a wasteful number, since it uses less digits than its factorization.

28664742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6023.

The product of its digits is 129024, while the sum is 39.

The square root of 28664742 is about 5353.9463949502. The cubic root of 28664742 is about 306.0431610698.

The spelling of 28664742 in words is "twenty-eight million, six hundred sixty-four thousand, seven hundred forty-two".