31105867328 has 56 divisors (see below), whose sum is σ = 65023410720. Its totient is φ = 14723251200.

The previous prime is 31105867319. The next prime is 31105867381. The reversal of 31105867328 is 82376850113.

It is a happy number.

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, 1733603 + ... + 1751453.

Almost surely, 2^31105867328 is an apocalyptic number.

31105867328 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31105867328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32511705360).

31105867328 is an abundant number, since it is smaller than the sum of its proper divisors (33917543392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31105867328 is a wasteful number, since it uses less digits than its factorization.

31105867328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19315 (or 19305 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 31105867328 in words is "thirty-one billion, one hundred five million, eight hundred sixty-seven thousand, three hundred twenty-eight".