70520 has 32 divisors (see below), whose sum is σ = 166320. Its totient is φ = 26880.

The previous prime is 70507. The next prime is 70529. The reversal of 70520 is 2507.

It is a plaindrome in base 16.

It is a zygodrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 70495 and 70504.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 70520.

It is not an unprimeable number, because it can be changed into a prime (70529) by changing a digit.

70520 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1619 + ... + 1661.

2⁷⁰⁵²⁰ 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 70520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83160).

70520 is an abundant number, since it is smaller than the sum of its proper divisors (95800).

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

70520 is a wasteful number, since it uses less digits than its factorization.

70520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 14.

The square root of 70520 is about 265.5560204552. The cubic root of 70520 is about 41.3146522125.

The spelling of 70520 in words is "seventy thousand, five hundred twenty".