28197019366 has 16 divisors (see below), whose sum is σ = 45010839456. Its totient is φ = 13201826176.

The previous prime is 28197019363. The next prime is 28197019399. The reversal of 28197019366 is 66391079182.

It is a happy number.

It is a super-2 number, since 2×28197019366² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28197019363) 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, 2098186 + ... + 2111581.

It is an arithmetic number, because the mean of its divisors is an integer number (2813177466).

Almost surely, 2^28197019366 is an apocalyptic number.

28197019366 is a deficient number, since it is larger than the sum of its proper divisors (16813820090).

28197019366 is a wasteful number, since it uses less digits than its factorization.

28197019366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4209983.

The product of its (nonzero) digits is 979776, while the sum is 52.

The spelling of 28197019366 in words is "twenty-eight billion, one hundred ninety-seven million, nineteen thousand, three hundred sixty-six".