31471488 has 96 divisors (see below), whose sum is σ = 95949360. Its totient is φ = 9867264.

The previous prime is 31471481. The next prime is 31471511. The reversal of 31471488 is 88417413.

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31471481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18781 + ... + 20387.

Almost surely, 2^31471488 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 31471488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47974680).

31471488 is an abundant number, since it is smaller than the sum of its proper divisors (64477872).

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

31471488 is a wasteful number, since it uses less digits than its factorization.

31471488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644 (or 1629 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 31471488 is about 5609.9454542803. The cubic root of 31471488 is about 315.7226643227.

The spelling of 31471488 in words is "thirty-one million, four hundred seventy-one thousand, four hundred eighty-eight".