28148617518 has 48 divisors (see below), whose sum is σ = 65559153744. Its totient is φ = 8033800320.

The previous prime is 28148617513. The next prime is 28148617543. The reversal of 28148617518 is 81571684182.

It is a Smith number, since the sum of its digits (51) 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 (28148617513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 224388 + ... + 326568.

It is an arithmetic number, because the mean of its divisors is an integer number (1365815703).

Almost surely, 2^28148617518 is an apocalyptic number.

28148617518 is an abundant number, since it is smaller than the sum of its proper divisors (37410536226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28148617518 is a wasteful number, since it uses less digits than its factorization.

28148617518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103137 (or 103130 counting only the distinct ones).

The product of its digits is 860160, while the sum is 51.

The spelling of 28148617518 in words is "twenty-eight billion, one hundred forty-eight million, six hundred seventeen thousand, five hundred eighteen".