28064697 has 8 divisors (see below), whose sum is σ = 38033280. Its totient is φ = 18402960.

The previous prime is 28064693. The next prime is 28064711. The reversal of 28064697 is 79646082.

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

It is not a de Polignac number, because 28064697 - 2² = 28064693 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28064693) 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, 76497 + ... + 76862.

It is an arithmetic number, because the mean of its divisors is an integer number (4754160).

Almost surely, 2^28064697 is an apocalyptic number.

It is an amenable number.

28064697 is a deficient number, since it is larger than the sum of its proper divisors (9968583).

28064697 is a wasteful number, since it uses less digits than its factorization.

28064697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153423.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 28064697 is about 5297.6123867267. The cubic root of 28064697 is about 303.8925960900.

It can be divided in two parts, 2806 and 4697, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 28064697 in words is "twenty-eight million, sixty-four thousand, six hundred ninety-seven".