31486448 has 80 divisors (see below), whose sum is σ = 77137920. Its totient is φ = 12131328.

The previous prime is 31486423. The next prime is 31486451. The reversal of 31486448 is 84468413.

Its product of digits (73728) is a multiple of the sum of its prime divisors (768).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43433 + ... + 44151.

It is an arithmetic number, because the mean of its divisors is an integer number (964224).

Almost surely, 2^31486448 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 31486448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38568960).

31486448 is an abundant number, since it is smaller than the sum of its proper divisors (45651472).

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

31486448 is a wasteful number, since it uses less digits than its factorization.

31486448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774 (or 768 counting only the distinct ones).

The product of its digits is 73728, while the sum is 38.

The square root of 31486448 is about 5611.2786421635. The cubic root of 31486448 is about 315.7726827485.

The spelling of 31486448 in words is "thirty-one million, four hundred eighty-six thousand, four hundred forty-eight".