70218720 has 432 divisors, whose sum is σ = 292795776. Its totient is φ = 15206400.

The previous prime is 70218719. The next prime is 70218727. The reversal of 70218720 is 2781207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70218727) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2265105 + ... + 2265135.

It is an arithmetic number, because the mean of its divisors is an integer number (677768).

Almost surely, 2^70218720 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 70218720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146397888).

70218720 is an abundant number, since it is smaller than the sum of its proper divisors (222577056).

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

70218720 is a wasteful number, since it uses less digits than its factorization.

70218720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 70218720 is about 8379.6610909988. The cubic root of 70218720 is about 412.5573253664.

Adding to 70218720 its reverse (2781207), we get a palindrome (72999927).

It can be divided in two parts, 702187 and 20, that added together give a palindrome (702207).

The spelling of 70218720 in words is "seventy million, two hundred eighteen thousand, seven hundred twenty".