28391753481075 has 60 divisors (see below), whose sum is σ = 52631584997640. Its totient is φ = 15130681597440.

The previous prime is 28391753481073. The next prime is 28391753481101. The reversal of 28391753481075 is 57018435719382.

It is a happy number.

28391753481075 is a `hidden beast` number, since 2 + 8 + 3 + 9 + 17 + 534 + 8 + 10 + 75 = 666.

It is not a de Polignac number, because 28391753481075 - 2¹ = 28391753481073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28391753481073) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 2716990 + ... + 8010339.

It is an arithmetic number, because the mean of its divisors is an integer number (877193083294).

Almost surely, 2^{28391753481075} is an apocalyptic number.

28391753481075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28391753481075 is a deficient number, since it is larger than the sum of its proper divisors (24239831516565).

28391753481075 is a wasteful number, since it uses less digits than its factorization.

28391753481075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10728658 (or 10728644 counting only the distinct ones).

The product of its (nonzero) digits is 50803200, while the sum is 63.

The spelling of 28391753481075 in words is "twenty-eight trillion, three hundred ninety-one billion, seven hundred fifty-three million, four hundred eighty-one thousand, seventy-five".