70420 has 24 divisors (see below), whose sum is σ = 169344. Its totient is φ = 24096.

The previous prime is 70393. The next prime is 70423. The reversal of 70420 is 2407.

It is a super-3 number, since 3×70420³ = 1047633354264000, which contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 70420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70423) by changing a digit.

70420 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, 112 + ... + 391.

It is an arithmetic number, because the mean of its divisors is an integer number (7056).

2⁷⁰⁴²⁰ is an apocalyptic number.

70420 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

70420 is an abundant number, since it is smaller than the sum of its proper divisors (98924).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84672).

70420 is a wasteful number, since it uses less digits than its factorization.

70420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 13.

The square root of 70420 is about 265.3676694701. The cubic root of 70420 is about 41.2951144000.

Subtracting from 70420 its sum of digits (13), we obtain a palindrome (70407).

Adding to 70420 its reverse (2407), we get a palindrome (72827).

The spelling of 70420 in words is "seventy thousand, four hundred twenty", and thus it is an iban number.