28046729 has 8 divisors (see below), whose sum is σ = 29320512. Its totient is φ = 26777520.

The previous prime is 28046671. The next prime is 28046731. The reversal of 28046729 is 92764082.

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

It is not a de Polignac number, because 28046729 - 2²⁴ = 11269513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28046692 and 28046701.

It is not an unprimeable number, because it can be changed into a prime (28046749) 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, 19619 + ... + 20999.

It is an arithmetic number, because the mean of its divisors is an integer number (3665064).

Almost surely, 2^28046729 is an apocalyptic number.

It is an amenable number.

28046729 is a deficient number, since it is larger than the sum of its proper divisors (1273783).

28046729 is a wasteful number, since it uses less digits than its factorization.

28046729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2287.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 28046729 is about 5295.9162568908. The cubic root of 28046729 is about 303.8277280237.

The spelling of 28046729 in words is "twenty-eight million, forty-six thousand, seven hundred twenty-nine".