28197926201 has 4 divisors (see below), whose sum is σ = 29682027600. Its totient is φ = 26713824804.

The previous prime is 28197926143. The next prime is 28197926243. The reversal of 28197926201 is 10262979182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28197926201 - 2³⁰ = 27124184377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28197925201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 742050671 + ... + 742050708.

It is an arithmetic number, because the mean of its divisors is an integer number (7420506900).

Almost surely, 2^28197926201 is an apocalyptic number.

It is an amenable number.

28197926201 is a deficient number, since it is larger than the sum of its proper divisors (1484101399).

28197926201 is a wasteful number, since it uses less digits than its factorization.

28197926201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484101398.

The product of its (nonzero) digits is 217728, while the sum is 47.

The spelling of 28197926201 in words is "twenty-eight billion, one hundred ninety-seven million, nine hundred twenty-six thousand, two hundred one".