28798345575 has 18 divisors (see below), whose sum is σ = 51581037144. Its totient is φ = 15359117520.

The previous prime is 28798345519. The next prime is 28798345591. The reversal of 28798345575 is 57554389782.

28798345575 is a `hidden beast` number, since 2 + 8 + 79 + 8 + 3 + 4 + 557 + 5 = 666.

It is not a de Polignac number, because 28798345575 - 2⁸ = 28798345319 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 63996099 + ... + 63996548.

Almost surely, 2^28798345575 is an apocalyptic number.

28798345575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28798345575 is a deficient number, since it is larger than the sum of its proper divisors (22782691569).

28798345575 is a wasteful number, since it uses less digits than its factorization.

28798345575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127992663 (or 127992655 counting only the distinct ones).

The product of its digits is 84672000, while the sum is 63.

The spelling of 28798345575 in words is "twenty-eight billion, seven hundred ninety-eight million, three hundred forty-five thousand, five hundred seventy-five".