70067440 has 80 divisors (see below), whose sum is σ = 177131520. Its totient is φ = 25678080.

The previous prime is 70067429. The next prime is 70067441. The reversal of 70067440 is 4476007.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×70067440² = 9818892296307200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 70067399 and 70067408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70067441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46377 + ... + 47863.

It is an arithmetic number, because the mean of its divisors is an integer number (2214144).

Almost surely, 2^70067440 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 70067440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88565760).

70067440 is an abundant number, since it is smaller than the sum of its proper divisors (107064080).

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

70067440 is a wasteful number, since it uses less digits than its factorization.

70067440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550 (or 1544 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 70067440 is about 8370.6296059496. The cubic root of 70067440 is about 412.2608396333.

It can be divided in two parts, 70067 and 440, that added together give a palindrome (70507).

The spelling of 70067440 in words is "seventy million, sixty-seven thousand, four hundred forty".