70032720 has 80 divisors (see below), whose sum is σ = 224128512. Its totient is φ = 18071040.

The previous prime is 70032719. The next prime is 70032733. The reversal of 70032720 is 2723007.

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

It is a congruent number.

It is an unprimeable number.

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, 2734 + ... + 12146.

Almost surely, 2^70032720 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 70032720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112064256).

70032720 is an abundant number, since it is smaller than the sum of its proper divisors (154095792).

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

70032720 is a wasteful number, since it uses less digits than its factorization.

70032720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9460 (or 9454 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 21.

The square root of 70032720 is about 8368.5554308973. Note that the first 3 decimals coincide. The cubic root of 70032720 is about 412.1927335284.

Adding to 70032720 its reverse (2723007), we get a palindrome (72755727).

The spelling of 70032720 in words is "seventy million, thirty-two thousand, seven hundred twenty".