70218224 has 40 divisors (see below), whose sum is σ = 147847680. Its totient is φ = 32184000.

The previous prime is 70218223. The next prime is 70218229. The reversal of 70218224 is 42281207.

It is a junction number, because it is equal to n+sod(n) for n = 70218193 and 70218202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70218223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5699 + ... + 13149.

It is an arithmetic number, because the mean of its divisors is an integer number (3696192).

Almost surely, 2^70218224 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 70218224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73923840).

70218224 is an abundant number, since it is smaller than the sum of its proper divisors (77629456).

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

70218224 is a wasteful number, since it uses less digits than its factorization.

70218224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7509 (or 7503 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 70218224 is about 8379.6314954776. The cubic root of 70218224 is about 412.5563539782.

The spelling of 70218224 in words is "seventy million, two hundred eighteen thousand, two hundred twenty-four".