28774705 has 8 divisors (see below), whose sum is σ = 34558632. Its totient is φ = 23000448.

The previous prime is 28774687. The next prime is 28774709. The reversal of 28774705 is 50747782.

It can be written as a sum of positive squares in 4 ways, for example, as 2209 + 28772496 = 47^2 + 5364^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28774705 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28774709) 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, 9339 + ... + 12031.

It is an arithmetic number, because the mean of its divisors is an integer number (4319829).

Almost surely, 2^28774705 is an apocalyptic number.

It is an amenable number.

28774705 is a deficient number, since it is larger than the sum of its proper divisors (5783927).

28774705 is a wasteful number, since it uses less digits than its factorization.

28774705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4835.

The product of its (nonzero) digits is 109760, while the sum is 40.

The square root of 28774705 is about 5364.2059058168. The cubic root of 28774705 is about 306.4340068705.

The spelling of 28774705 in words is "twenty-eight million, seven hundred seventy-four thousand, seven hundred five".