70111720 has 64 divisors (see below), whose sum is σ = 181209600. Its totient is φ = 23915520.

The previous prime is 70111711. The next prime is 70111721. The reversal of 70111720 is 2711107.

It is not an unprimeable number, because it can be changed into a prime (70111721) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 66961 + ... + 67999.

It is an arithmetic number, because the mean of its divisors is an integer number (2831400).

Almost surely, 2^70111720 is an apocalyptic number.

70111720 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70111720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90604800).

70111720 is an abundant number, since it is smaller than the sum of its proper divisors (111097880).

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

70111720 is a wasteful number, since it uses less digits than its factorization.

70111720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298 (or 1294 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 19.

The square root of 70111720 is about 8373.2741505339. The cubic root of 70111720 is about 412.3476658199.

Adding to 70111720 its reverse (2711107), we get a palindrome (72822827).

It can be divided in two parts, 701 and 11720, that added together give a palindrome (12421).

The spelling of 70111720 in words is "seventy million, one hundred eleven thousand, seven hundred twenty".