28228070697 has 8 divisors (see below), whose sum is σ = 37644994656. Its totient is φ = 18814930272.

The previous prime is 28228070693. The next prime is 28228070719. The reversal of 28228070697 is 79607082282.

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

It is not a de Polignac number, because 28228070697 - 2² = 28228070693 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28228070693) 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, 928428 + ... + 958349.

It is an arithmetic number, because the mean of its divisors is an integer number (4705624332).

Almost surely, 2^28228070697 is an apocalyptic number.

It is an amenable number.

28228070697 is a deficient number, since it is larger than the sum of its proper divisors (9416923959).

28228070697 is a wasteful number, since it uses less digits than its factorization.

28228070697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1891767.

The product of its (nonzero) digits is 1354752, while the sum is 51.

The spelling of 28228070697 in words is "twenty-eight billion, two hundred twenty-eight million, seventy thousand, six hundred ninety-seven".