3420720732 has 96 divisors (see below), whose sum is σ = 9449282304. Its totient is φ = 949478400.

The previous prime is 3420720691. The next prime is 3420720763. The reversal of 3420720732 is 2370270243.

3420720732 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 3420720732.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 217188 + ... + 232404.

It is an arithmetic number, because the mean of its divisors is an integer number (98430024).

Almost surely, 2^3420720732 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 3420720732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4724641152).

3420720732 is an abundant number, since it is smaller than the sum of its proper divisors (6028561572).

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

3420720732 is a wasteful number, since it uses less digits than its factorization.

3420720732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15379 (or 15377 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 30.

The square root of 3420720732 is about 58486.9278728162. The cubic root of 3420720732 is about 1506.7430835712.

Adding to 3420720732 its reverse (2370270243), we get a palindrome (5790990975).

The spelling of 3420720732 in words is "three billion, four hundred twenty million, seven hundred twenty thousand, seven hundred thirty-two".