31282464 has 48 divisors (see below), whose sum is σ = 84345408. Its totient is φ = 10144512.

The previous prime is 31282429. The next prime is 31282469. The reversal of 31282464 is 46428213.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×31282464² = 1957185107822592, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (31282469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 852 + ... + 7955.

It is an arithmetic number, because the mean of its divisors is an integer number (1757196).

Almost surely, 2^31282464 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 31282464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42172704).

31282464 is an abundant number, since it is smaller than the sum of its proper divisors (53062944).

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

31282464 is a wasteful number, since it uses less digits than its factorization.

31282464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8857 (or 8849 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

The square root of 31282464 is about 5593.0728584563. The cubic root of 31282464 is about 315.0892969309.

The spelling of 31282464 in words is "thirty-one million, two hundred eighty-two thousand, four hundred sixty-four".