31340064 has 96 divisors (see below), whose sum is σ = 94953600. Its totient is φ = 8865792.

The previous prime is 31340059. The next prime is 31340069. The reversal of 31340064 is 46004313.

It is an interprime number because it is at equal distance from previous prime (31340059) and next prime (31340069).

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

It is a super-2 number, since 2×31340064² = 1964399223048192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 31340064.

It is not an unprimeable number, because it can be changed into a prime (31340069) 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, 99972 + ... + 100284.

It is an arithmetic number, because the mean of its divisors is an integer number (989100).

Almost surely, 2^31340064 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 31340064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47476800).

31340064 is an abundant number, since it is smaller than the sum of its proper divisors (63613536).

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

31340064 is a wasteful number, since it uses less digits than its factorization.

31340064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482 (or 474 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 31340064 is about 5598.2197170172. The cubic root of 31340064 is about 315.2825683180.

Adding to 31340064 its reverse (46004313), we get a palindrome (77344377).

The spelling of 31340064 in words is "thirty-one million, three hundred forty thousand, sixty-four".