31680486 has 48 divisors (see below), whose sum is σ = 76518000. Its totient is φ = 9414144.

The previous prime is 31680443. The next prime is 31680487. The reversal of 31680486 is 68408613.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31680486.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31680487) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3090 + ... + 8538.

It is an arithmetic number, because the mean of its divisors is an integer number (1594125).

Almost surely, 2^31680486 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31680486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38259000).

31680486 is an abundant number, since it is smaller than the sum of its proper divisors (44837514).

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

31680486 is a wasteful number, since it uses less digits than its factorization.

31680486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5493 (or 5490 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 31680486 is about 5628.5420847676. The cubic root of 31680486 is about 316.4200137789.

The spelling of 31680486 in words is "thirty-one million, six hundred eighty thousand, four hundred eighty-six".