28197756118 has 16 divisors (see below), whose sum is σ = 48342645504. Its totient is φ = 12083843880.

The previous prime is 28197756107. The next prime is 28197756127. The reversal of 28197756118 is 81165779182.

It is a super-2 number, since 2×28197756118² (a number of 22 digits) contains 22 as substring.

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 in 7 ways as a sum of consecutive naturals, for example, 137871 + ... + 274597.

It is an arithmetic number, because the mean of its divisors is an integer number (3021415344).

Almost surely, 2^28197756118 is an apocalyptic number.

28197756118 is a deficient number, since it is larger than the sum of its proper divisors (20144889386).

28197756118 is a wasteful number, since it uses less digits than its factorization.

28197756118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151467.

The product of its digits is 1693440, while the sum is 55.

The spelling of 28197756118 in words is "twenty-eight billion, one hundred ninety-seven million, seven hundred fifty-six thousand, one hundred eighteen".