70311540 has 96 divisors (see below), whose sum is σ = 214220160. Its totient is φ = 17127936.

The previous prime is 70311511. The next prime is 70311601. The reversal of 70311540 is 4511307.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84607 + ... + 85433.

It is an arithmetic number, because the mean of its divisors is an integer number (2231460).

Almost surely, 2^70311540 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 70311540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107110080).

70311540 is an abundant number, since it is smaller than the sum of its proper divisors (143908620).

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

70311540 is a wasteful number, since it uses less digits than its factorization.

70311540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961 (or 959 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 70311540 is about 8385.1976720886. The cubic root of 70311540 is about 412.7390276736.

Adding to 70311540 its reverse (4511307), we get a palindrome (74822847).

The spelling of 70311540 in words is "seventy million, three hundred eleven thousand, five hundred forty".