70220320 has 24 divisors (see below), whose sum is σ = 165895884. Its totient is φ = 28088064.

The previous prime is 70220317. The next prime is 70220321. The reversal of 70220320 is 2302207.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 68359824 + 1860496 = 8268^2 + 1364^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 70220294 and 70220303.

It is not an unprimeable number, because it can be changed into a prime (70220321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219279 + ... + 219598.

Almost surely, 2^70220320 is an apocalyptic number.

It is an amenable number.

70220320 is an abundant number, since it is smaller than the sum of its proper divisors (95675564).

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

70220320 is a wasteful number, since it uses less digits than its factorization.

70220320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438892 (or 438884 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 70220320 is about 8379.7565597098. The cubic root of 70220320 is about 412.5604588457.

Adding to 70220320 its reverse (2302207), we get a palindrome (72522527).

The spelling of 70220320 in words is "seventy million, two hundred twenty thousand, three hundred twenty".