28397426206 has 4 divisors (see below), whose sum is σ = 42596139312. Its totient is φ = 14198713102.

The previous prime is 28397426177. The next prime is 28397426219. The reversal of 28397426206 is 60262479382.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28397426206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7099356550 + ... + 7099356553.

It is an arithmetic number, because the mean of its divisors is an integer number (10649034828).

Almost surely, 2^28397426206 is an apocalyptic number.

28397426206 is a deficient number, since it is larger than the sum of its proper divisors (14198713106).

28397426206 is a wasteful number, since it uses less digits than its factorization.

28397426206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14198713105.

The product of its (nonzero) digits is 1741824, while the sum is 49.

The spelling of 28397426206 in words is "twenty-eight billion, three hundred ninety-seven million, four hundred twenty-six thousand, two hundred six".