70140240 has 120 divisors (see below), whose sum is σ = 239565768. Its totient is φ = 18385920.

The previous prime is 70140227. The next prime is 70140247. The reversal of 70140240 is 4204107.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1382976 + 68757264 = 1176^2 + 8292^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70140247) 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, 43122 + ... + 44718.

Almost surely, 2^70140240 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 70140240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119782884).

70140240 is an abundant number, since it is smaller than the sum of its proper divisors (169425528).

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

70140240 is a wasteful number, since it uses less digits than its factorization.

70140240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1677 (or 1668 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 70140240 is about 8374.9770148938. The cubic root of 70140240 is about 412.4035697457.

Adding to 70140240 its reverse (4204107), we get a palindrome (74344347).

The spelling of 70140240 in words is "seventy million, one hundred forty thousand, two hundred forty".