31263930 has 96 divisors (see below), whose sum is σ = 87609600. Its totient is φ = 7710336.

The previous prime is 31263917. The next prime is 31263941. The reversal of 31263930 is 3936213.

It is a junction number, because it is equal to n+sod(n) for n = 31263894 and 31263903.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 80176 + ... + 80564.

It is an arithmetic number, because the mean of its divisors is an integer number (912600).

Almost surely, 2^31263930 is an apocalyptic number.

31263930 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31263930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43804800).

31263930 is an abundant number, since it is smaller than the sum of its proper divisors (56345670).

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

31263930 is a wasteful number, since it uses less digits than its factorization.

31263930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468 (or 465 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

The square root of 31263930 is about 5591.4157420102. The cubic root of 31263930 is about 315.0270573886.

It can be divided in two parts, 3126 and 3930, that added together give a square (7056 = 84²).

The spelling of 31263930 in words is "thirty-one million, two hundred sixty-three thousand, nine hundred thirty".