28317731530 has 16 divisors (see below), whose sum is σ = 55605727584. Its totient is φ = 10297356880.

The previous prime is 28317731389. The next prime is 28317731543. The reversal of 28317731530 is 3513771382.

It is a super-2 number, since 2×28317731530² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128716852 + ... + 128717071.

It is an arithmetic number, because the mean of its divisors is an integer number (3475357974).

Almost surely, 2^28317731530 is an apocalyptic number.

28317731530 is a deficient number, since it is larger than the sum of its proper divisors (27287996054).

28317731530 is a wasteful number, since it uses less digits than its factorization.

28317731530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257433941.

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 28317731530 in words is "twenty-eight billion, three hundred seventeen million, seven hundred thirty-one thousand, five hundred thirty".