70036440 has 128 divisors (see below), whose sum is σ = 220907520. Its totient is φ = 17740800.

The previous prime is 70036433. The next prime is 70036441. The reversal of 70036440 is 4463007.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 70036440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70036441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 249100 + ... + 249380.

It is an arithmetic number, because the mean of its divisors is an integer number (1725840).

Almost surely, 2^70036440 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 70036440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110453760).

70036440 is an abundant number, since it is smaller than the sum of its proper divisors (150871080).

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

70036440 is a wasteful number, since it uses less digits than its factorization.

70036440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393 (or 389 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 70036440 is about 8368.7776885278. Note that the first 3 decimals coincide. The cubic root of 70036440 is about 412.2000316876.

Adding to 70036440 its reverse (4463007), we get a palindrome (74499447).

The spelling of 70036440 in words is "seventy million, thirty-six thousand, four hundred forty".