28862729 has 32 divisors (see below), whose sum is σ = 36556800. Its totient is φ = 22239360.

The previous prime is 28862711. The next prime is 28862731. The reversal of 28862729 is 92726882.

It is a cyclic number.

It is not a de Polignac number, because 28862729 - 2¹⁶ = 28797193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28862729.

It is not an unprimeable number, because it can be changed into a prime (28862759) 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 31 ways as a sum of consecutive naturals, for example, 365312 + ... + 365390.

It is an arithmetic number, because the mean of its divisors is an integer number (1142400).

Almost surely, 2^28862729 is an apocalyptic number.

It is an amenable number.

28862729 is a deficient number, since it is larger than the sum of its proper divisors (7694071).

28862729 is a wasteful number, since it uses less digits than its factorization.

28862729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213.

The product of its digits is 193536, while the sum is 44.

The square root of 28862729 is about 5372.4043965435. The cubic root of 28862729 is about 306.7461570612.

The spelling of 28862729 in words is "twenty-eight million, eight hundred sixty-two thousand, seven hundred twenty-nine".