70518240 has 144 divisors (see below), whose sum is σ = 259223328. Its totient is φ = 17353728.

The previous prime is 70518233. The next prime is 70518241. The reversal of 70518240 is 4281507.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70518241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16837 + ... + 20603.

It is an arithmetic number, because the mean of its divisors is an integer number (1800162).

Almost surely, 2^70518240 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 70518240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129611664).

70518240 is an abundant number, since it is smaller than the sum of its proper divisors (188705088).

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

70518240 is a wasteful number, since it uses less digits than its factorization.

70518240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3801 (or 3790 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 70518240 is about 8397.5139178212. The cubic root of 70518240 is about 413.1430850674.

Adding to 70518240 its reverse (4281507), we get a palindrome (74799747).

The spelling of 70518240 in words is "seventy million, five hundred eighteen thousand, two hundred forty".