70101720 has 128 divisors (see below), whose sum is σ = 251697600. Its totient is φ = 17252352.

The previous prime is 70101701. The next prime is 70101721. The reversal of 70101720 is 2710107.

It is a super-2 number, since 2×70101720² = 9828502293916800, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 70101693 and 70101702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70101721) 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 31 ways as a sum of consecutive naturals, for example, 11544 + ... + 16536.

Almost surely, 2^70101720 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 70101720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125848800).

70101720 is an abundant number, since it is smaller than the sum of its proper divisors (181595880).

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

70101720 is a wasteful number, since it uses less digits than its factorization.

70101720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5026 (or 5016 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 18.

The square root of 70101720 is about 8372.6769912615. The cubic root of 70101720 is about 412.3280605731.

Adding to 70101720 its reverse (2710107), we get a palindrome (72811827).

The spelling of 70101720 in words is "seventy million, one hundred one thousand, seven hundred twenty".