31340070 has 96 divisors (see below), whose sum is σ = 86261760. Its totient is φ = 7882560.

The previous prime is 31340069. The next prime is 31340081. The reversal of 31340070 is 7004313.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 131011 + ... + 131249.

It is an arithmetic number, because the mean of its divisors is an integer number (898560).

Almost surely, 2^31340070 is an apocalyptic number.

31340070 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31340070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43130880).

31340070 is an abundant number, since it is smaller than the sum of its proper divisors (54921690).

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

31340070 is a wasteful number, since it uses less digits than its factorization.

31340070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 31340070 is about 5598.2202529018. The cubic root of 31340070 is about 315.2825884381.

Adding to 31340070 its reverse (7004313), we get a palindrome (38344383).

The spelling of 31340070 in words is "thirty-one million, three hundred forty thousand, seventy".