34520420 has 48 divisors (see below), whose sum is σ = 79627968. Its totient is φ = 12466560.

The previous prime is 34520417. The next prime is 34520429. The reversal of 34520420 is 2402543.

34520420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 34520392 and 34520401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34520429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37607 + ... + 38513.

It is an arithmetic number, because the mean of its divisors is an integer number (1658916).

Almost surely, 2^34520420 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 34520420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39813984).

34520420 is an abundant number, since it is smaller than the sum of its proper divisors (45107548).

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

34520420 is a wasteful number, since it uses less digits than its factorization.

34520420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100 (or 1098 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 34520420 is about 5875.4080709343. The cubic root of 34520420 is about 325.6057185174.

Adding to 34520420 its reverse (2402543), we get a palindrome (36922963).

The spelling of 34520420 in words is "thirty-four million, five hundred twenty thousand, four hundred twenty".