31980060 has 144 divisors (see below), whose sum is σ = 117464256. Its totient is φ = 6875136.

The previous prime is 31980049. The next prime is 31980061. The reversal of 31980060 is 6008913.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31980061) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20674 + ... + 22166.

It is an arithmetic number, because the mean of its divisors is an integer number (815724).

Almost surely, 2^31980060 is an apocalyptic number.

31980060 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 31980060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58732128).

31980060 is an abundant number, since it is smaller than the sum of its proper divisors (85484196).

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

31980060 is a wasteful number, since it uses less digits than its factorization.

31980060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532 (or 1527 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 31980060 is about 5655.0915111959. The cubic root of 31980060 is about 317.4142534066.

Adding to 31980060 its reverse (6008913), we get a palindrome (37988973).

The spelling of 31980060 in words is "thirty-one million, nine hundred eighty thousand, sixty".