31430247028 has 12 divisors (see below), whose sum is σ = 55011724992. Its totient is φ = 15712611320.

The previous prime is 31430247007. The next prime is 31430247049. The reversal of 31430247028 is 82074203413.

It is an interprime number because it is at equal distance from previous prime (31430247007) and next prime (31430247049).

It is a super-2 number, since 2×31430247028² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31430246984 and 31430247002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 599758 + ... + 650053.

It is an arithmetic number, because the mean of its divisors is an integer number (4584310416).

Almost surely, 2^31430247028 is an apocalyptic number.

It is an amenable number.

31430247028 is a deficient number, since it is larger than the sum of its proper divisors (23581477964).

31430247028 is a wasteful number, since it uses less digits than its factorization.

31430247028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256102 (or 1256100 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 34.

The spelling of 31430247028 in words is "thirty-one billion, four hundred thirty million, two hundred forty-seven thousand, twenty-eight".