31485888 has 224 divisors, whose sum is σ = 112166400. Its totient is φ = 8460288.

The previous prime is 31485871. The next prime is 31485889. The reversal of 31485888 is 88858413.

It is a tau number, because it is divible by the number of its divisors (224).

It is a super-2 number, since 2×31485888² = 1982722286297088, which contains 22 as substring.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31485889) 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, 229756 + ... + 229892.

Almost surely, 2^31485888 is an apocalyptic number.

31485888 is a gapful number since it is divisible by the number (38) 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 31485888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56083200).

31485888 is an abundant number, since it is smaller than the sum of its proper divisors (80680512).

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

31485888 is a wasteful number, since it uses less digits than its factorization.

31485888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 168 counting only the distinct ones).

The product of its digits is 245760, while the sum is 45.

The square root of 31485888 is about 5611.2287424414. The cubic root of 31485888 is about 315.7708106865.

The spelling of 31485888 in words is "thirty-one million, four hundred eighty-five thousand, eight hundred eighty-eight".