28180380075 has 12 divisors (see below), whose sum is σ = 46591561848. Its totient is φ = 15029536000.

The previous prime is 28180380061. The next prime is 28180380079. The reversal of 28180380075 is 57008308182.

It is a happy number.

It is not a de Polignac number, because 28180380075 - 2¹⁷ = 28180249003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28180380079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187869126 + ... + 187869275.

It is an arithmetic number, because the mean of its divisors is an integer number (3882630154).

Almost surely, 2^28180380075 is an apocalyptic number.

28180380075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28180380075 is a deficient number, since it is larger than the sum of its proper divisors (18411181773).

28180380075 is a wasteful number, since it uses less digits than its factorization.

28180380075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375738414 (or 375738409 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 42.

The spelling of 28180380075 in words is "twenty-eight billion, one hundred eighty million, three hundred eighty thousand, seventy-five".