70022720 has 56 divisors (see below), whose sum is σ = 168152064. Its totient is φ = 27772416.

The previous prime is 70022717. The next prime is 70022747. The reversal of 70022720 is 2722007.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 70022692 and 70022701.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39779 + ... + 41501.

Almost surely, 2^70022720 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 70022720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84076032).

70022720 is an abundant number, since it is smaller than the sum of its proper divisors (98129344).

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

70022720 is a wasteful number, since it uses less digits than its factorization.

70022720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1867 (or 1857 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 70022720 is about 8367.9579348847. The cubic root of 70022720 is about 412.1731135396.

Adding to 70022720 its reverse (2722007), we get a palindrome (72744727).

The spelling of 70022720 in words is "seventy million, twenty-two thousand, seven hundred twenty".