31489248 has 96 divisors (see below), whose sum is σ = 96574464. Its totient is φ = 8796672.

The previous prime is 31489247. The next prime is 31489259. The reversal of 31489248 is 84298413.

It is a tau number, because it is divible by the number of its divisors (96).

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 (31489243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31086 + ... + 32082.

It is an arithmetic number, because the mean of its divisors is an integer number (1005984).

Almost surely, 2^31489248 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 31489248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48287232).

31489248 is an abundant number, since it is smaller than the sum of its proper divisors (65085216).

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

31489248 is a wasteful number, since it uses less digits than its factorization.

31489248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064 (or 1056 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 31489248 is about 5611.5281341182. The cubic root of 31489248 is about 315.7820427257.

The spelling of 31489248 in words is "thirty-one million, four hundred eighty-nine thousand, two hundred forty-eight".