28646529 has 8 divisors (see below), whose sum is σ = 38573952. Its totient is φ = 18908400.

The previous prime is 28646507. The next prime is 28646531. The reversal of 28646529 is 92564682.

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

It is a de Polignac number, because none of the positive numbers 2^k-28646529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28646539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46969 + ... + 47574.

It is an arithmetic number, because the mean of its divisors is an integer number (4821744).

Almost surely, 2^28646529 is an apocalyptic number.

It is an amenable number.

28646529 is a deficient number, since it is larger than the sum of its proper divisors (9927423).

28646529 is a wasteful number, since it uses less digits than its factorization.

28646529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94647.

The product of its digits is 207360, while the sum is 42.

The square root of 28646529 is about 5352.2452298078. The cubic root of 28646529 is about 305.9783294492.

The spelling of 28646529 in words is "twenty-eight million, six hundred forty-six thousand, five hundred twenty-nine".