70331040 has 324 divisors, whose sum is σ = 276073434. Its totient is φ = 16293888.

The previous prime is 70331029. The next prime is 70331059. The reversal of 70331040 is 4013307.

It can be written as a sum of positive squares in 9 ways, for example, as 3549456 + 66781584 = 1884^2 + 8172^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 4137112 + ... + 4137128.

Almost surely, 2^70331040 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 70331040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138036717).

70331040 is an abundant number, since it is smaller than the sum of its proper divisors (205742394).

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

70331040 is a wasteful number, since it uses less digits than its factorization.

70331040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 70331040 is about 8386.3603547665. The cubic root of 70331040 is about 412.7771800978. Note that the first 3 decimals are identical.

Adding to 70331040 its reverse (4013307), we get a palindrome (74344347).

The spelling of 70331040 in words is "seventy million, three hundred thirty-one thousand, forty".