31428559968 has 96 divisors (see below), whose sum is σ = 88885843200. Its totient is φ = 9666003456.

The previous prime is 31428559919. The next prime is 31428559979. The reversal of 31428559968 is 86995582413.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×31428559968² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3838503 + ... + 3846681.

It is an arithmetic number, because the mean of its divisors is an integer number (925894200).

Almost surely, 2^31428559968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31428559968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44442921600).

31428559968 is an abundant number, since it is smaller than the sum of its proper divisors (57457283232).

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

31428559968 is a wasteful number, since it uses less digits than its factorization.

31428559968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11284 (or 11276 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 60.

The spelling of 31428559968 in words is "thirty-one billion, four hundred twenty-eight million, five hundred fifty-nine thousand, nine hundred sixty-eight".