70144220 has 12 divisors (see below), whose sum is σ = 147302904. Its totient is φ = 28057680.

The previous prime is 70144187. The next prime is 70144241. The reversal of 70144220 is 2244107.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 3507211 = 70144220 / (7 + 0 + 1 + 4 + 4 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 70144192 and 70144201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1753586 + ... + 1753625.

It is an arithmetic number, because the mean of its divisors is an integer number (12275242).

Almost surely, 2^70144220 is an apocalyptic number.

It is an amenable number.

70144220 is an abundant number, since it is smaller than the sum of its proper divisors (77158684).

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

70144220 is a wasteful number, since it uses less digits than its factorization.

70144220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3507220 (or 3507218 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 70144220 is about 8375.2146241156. The cubic root of 70144220 is about 412.4113700002.

Adding to 70144220 its reverse (2244107), we get a palindrome (72388327).

The spelling of 70144220 in words is "seventy million, one hundred forty-four thousand, two hundred twenty".