70006720 has 56 divisors (see below), whose sum is σ = 190524384. Its totient is φ = 24001536.

The previous prime is 70006691. The next prime is 70006723. The reversal of 70006720 is 2760007.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 70006691 and 70006700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70006723) 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 7 ways as a sum of consecutive naturals, for example, 13387 + ... + 17866.

Almost surely, 2^70006720 is an apocalyptic number.

70006720 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

70006720 is an abundant number, since it is smaller than the sum of its proper divisors (120517664).

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

70006720 is a wasteful number, since it uses less digits than its factorization.

70006720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31277 (or 31267 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 70006720 is about 8367.0018525156. The cubic root of 70006720 is about 412.1417176718.

Adding to 70006720 its reverse (2760007), we get a palindrome (72766727).

The spelling of 70006720 in words is "seventy million, six thousand, seven hundred twenty".