70107720 has 128 divisors (see below), whose sum is σ = 224380800. Its totient is φ = 17473536.

The previous prime is 70107707. The next prime is 70107733. The reversal of 70107720 is 2770107.

It is an interprime number because it is at equal distance from previous prime (70107707) and next prime (70107733).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 221002 + ... + 221318.

It is an arithmetic number, because the mean of its divisors is an integer number (1752975).

Almost surely, 2^70107720 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 70107720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112190400).

70107720 is an abundant number, since it is smaller than the sum of its proper divisors (154273080).

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

70107720 is a wasteful number, since it uses less digits than its factorization.

70107720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447 (or 443 counting only the distinct ones).

The product of its (nonzero) digits is 686, while the sum is 24.

The square root of 70107720 is about 8373.0352919357. The cubic root of 70107720 is about 412.3398239449.

Adding to 70107720 its reverse (2770107), we get a palindrome (72877827).

The spelling of 70107720 in words is "seventy million, one hundred seven thousand, seven hundred twenty".