28245356707 has 4 divisors (see below), whose sum is σ = 29906848296. Its totient is φ = 26583865120.

The previous prime is 28245356687. The next prime is 28245356729. The reversal of 28245356707 is 70765354282.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28245356707 - 2¹⁹ = 28244832419 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28245351707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 830745769 + ... + 830745802.

It is an arithmetic number, because the mean of its divisors is an integer number (7476712074).

Almost surely, 2^28245356707 is an apocalyptic number.

28245356707 is a deficient number, since it is larger than the sum of its proper divisors (1661491589).

28245356707 is a wasteful number, since it uses less digits than its factorization.

28245356707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661491588.

The product of its (nonzero) digits is 2822400, while the sum is 49.

The spelling of 28245356707 in words is "twenty-eight billion, two hundred forty-five million, three hundred fifty-six thousand, seven hundred seven".