28799705 has 8 divisors (see below), whose sum is σ = 37701504. Its totient is φ = 20945200.

The previous prime is 28799681. The next prime is 28799711. The reversal of 28799705 is 50799782.

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

It is not a de Polignac number, because 28799705 - 2¹⁰ = 28798681 is a prime.

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 28799705.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261761 + ... + 261870.

It is an arithmetic number, because the mean of its divisors is an integer number (4712688).

Almost surely, 2^28799705 is an apocalyptic number.

It is an amenable number.

28799705 is a deficient number, since it is larger than the sum of its proper divisors (8901799).

28799705 is a wasteful number, since it uses less digits than its factorization.

28799705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523647.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 28799705 is about 5366.5356609269. The cubic root of 28799705 is about 306.5227263738.

The spelling of 28799705 in words is "twenty-eight million, seven hundred ninety-nine thousand, seven hundred five".