31486000 has 160 divisors (see below), whose sum is σ = 94243968. Its totient is φ = 9907200.

The previous prime is 31485973. The next prime is 31486009. The reversal of 31486000 is 68413.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31486009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 181914 + ... + 182086.

Almost surely, 2^31486000 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 31486000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47121984).

31486000 is an abundant number, since it is smaller than the sum of its proper divisors (62757968).

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

31486000 is a wasteful number, since it uses less digits than its factorization.

31486000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 31486000 is about 5611.2387224213. The cubic root of 31486000 is about 315.7711851007.

The spelling of 31486000 in words is "thirty-one million, four hundred eighty-six thousand".