31430028393 has 24 divisors (see below), whose sum is σ = 45593778048. Its totient is φ = 20863537632.

The previous prime is 31430028391. The next prime is 31430028433. The reversal of 31430028393 is 39382003413.

31430028393 is a `hidden beast` number, since 314 + 300 + 2 + 8 + 39 + 3 = 666.

It is not a de Polignac number, because 31430028393 - 2¹ = 31430028391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31430028391) 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, 4063696 + ... + 4071422.

It is an arithmetic number, because the mean of its divisors is an integer number (1899740752).

Almost surely, 2^31430028393 is an apocalyptic number.

It is an amenable number.

31430028393 is a deficient number, since it is larger than the sum of its proper divisors (14163749655).

31430028393 is a wasteful number, since it uses less digits than its factorization.

31430028393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9613 (or 9610 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The spelling of 31430028393 in words is "thirty-one billion, four hundred thirty million, twenty-eight thousand, three hundred ninety-three".