31326120 has 192 divisors, whose sum is σ = 120407040. Its totient is φ = 6912000.

The previous prime is 31326083. The next prime is 31326133. The reversal of 31326120 is 2162313.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31326093 and 31326102.

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, 77920 + ... + 78320.

It is an arithmetic number, because the mean of its divisors is an integer number (627120).

Almost surely, 2^31326120 is an apocalyptic number.

31326120 is a gapful number since it is divisible by the number (30) 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 31326120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60203520).

31326120 is an abundant number, since it is smaller than the sum of its proper divisors (89080920).

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

31326120 is a wasteful number, since it uses less digits than its factorization.

31326120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 31326120 is about 5596.9741825383. The cubic root of 31326120 is about 315.2358022754.

Adding to 31326120 its reverse (2162313), we get a palindrome (33488433).

The spelling of 31326120 in words is "thirty-one million, three hundred twenty-six thousand, one hundred twenty".