31428813504 has 224 divisors, whose sum is σ = 94234406400. Its totient is φ = 9160335360.

The previous prime is 31428813497. The next prime is 31428813569. The reversal of 31428813504 is 40531882413.

It is a super-3 number, since 3×31428813504³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6952557 + ... + 6957075.

Almost surely, 2^31428813504 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 31428813504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47117203200).

31428813504 is an abundant number, since it is smaller than the sum of its proper divisors (62805592896).

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

31428813504 is a wasteful number, since it uses less digits than its factorization.

31428813504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4671 (or 4661 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The spelling of 31428813504 in words is "thirty-one billion, four hundred twenty-eight million, eight hundred thirteen thousand, five hundred four".