28664726 has 4 divisors (see below), whose sum is σ = 42997092. Its totient is φ = 14332362.

The previous prime is 28664723. The next prime is 28664729. The reversal of 28664726 is 62746682.

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

It is an interprime number because it is at equal distance from previous prime (28664723) and next prime (28664729).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28664723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7166180 + ... + 7166183.

It is an arithmetic number, because the mean of its divisors is an integer number (10749273).

Almost surely, 2^28664726 is an apocalyptic number.

28664726 is a deficient number, since it is larger than the sum of its proper divisors (14332366).

28664726 is a wasteful number, since it uses less digits than its factorization.

28664726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14332365.

The product of its digits is 193536, while the sum is 41.

The square root of 28664726 is about 5353.9449007251. The cubic root of 28664726 is about 306.0431041277.

The spelling of 28664726 in words is "twenty-eight million, six hundred sixty-four thousand, seven hundred twenty-six".