28864529 has 8 divisors (see below), whose sum is σ = 29527872. Its totient is φ = 28207440.

The previous prime is 28864523. The next prime is 28864543. The reversal of 28864529 is 92546882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28864529 is a prime.

It is a super-2 number, since 2×28864529² = 1666322068783682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28864529.

It is not an unprimeable number, because it can be changed into a prime (28864523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8492 + ... + 11394.

It is an arithmetic number, because the mean of its divisors is an integer number (3690984).

Almost surely, 2^28864529 is an apocalyptic number.

It is an amenable number.

28864529 is a deficient number, since it is larger than the sum of its proper divisors (663343).

28864529 is a wasteful number, since it uses less digits than its factorization.

28864529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3127.

The product of its digits is 276480, while the sum is 44.

The square root of 28864529 is about 5372.5719166894. The cubic root of 28864529 is about 306.7525335846.

The spelling of 28864529 in words is "twenty-eight million, eight hundred sixty-four thousand, five hundred twenty-nine".