28180354268 has 48 divisors (see below), whose sum is σ = 55260285696. Its totient is φ = 12463570560.

The previous prime is 28180354261. The next prime is 28180354277. The reversal of 28180354268 is 86245308182.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28180354261) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 469280 + ... + 525912.

It is an arithmetic number, because the mean of its divisors is an integer number (1151255952).

Almost surely, 2^28180354268 is an apocalyptic number.

It is an amenable number.

28180354268 is a deficient number, since it is larger than the sum of its proper divisors (27079931428).

28180354268 is a wasteful number, since it uses less digits than its factorization.

28180354268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56954 (or 56952 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 47.

The spelling of 28180354268 in words is "twenty-eight billion, one hundred eighty million, three hundred fifty-four thousand, two hundred sixty-eight".