28723735 has 8 divisors (see below), whose sum is σ = 34510896. Its totient is φ = 22950720.

The previous prime is 28723733. The next prime is 28723753. The reversal of 28723735 is 53732782.

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

It is not a de Polignac number, because 28723735 - 2¹ = 28723733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28723694 and 28723703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28723733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1620 + ... + 7750.

It is an arithmetic number, because the mean of its divisors is an integer number (4313862).

Almost surely, 2^28723735 is an apocalyptic number.

28723735 is a deficient number, since it is larger than the sum of its proper divisors (5787161).

28723735 is an equidigital number, since it uses as much as digits as its factorization.

28723735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7073.

The product of its digits is 70560, while the sum is 37.

The square root of 28723735 is about 5359.4528638659. The cubic root of 28723735 is about 306.2529662353.

The spelling of 28723735 in words is "twenty-eight million, seven hundred twenty-three thousand, seven hundred thirty-five".