3420305028 has 120 divisors (see below), whose sum is σ = 10255557312. Its totient is φ = 973705536.

The previous prime is 3420305027. The next prime is 3420305033. The reversal of 3420305028 is 8205030243.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 3420304992 and 3420305010.

It is not an unprimeable number, because it can be changed into a prime (3420305023) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 661951 + ... + 667097.

Almost surely, 2^3420305028 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 3420305028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5127778656).

3420305028 is an abundant number, since it is smaller than the sum of its proper divisors (6835252284).

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

3420305028 is a wasteful number, since it uses less digits than its factorization.

3420305028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5463 (or 5452 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 3420305028 is about 58483.3739450795. The cubic root of 3420305028 is about 1506.6820453134.

The spelling of 3420305028 in words is "three billion, four hundred twenty million, three hundred five thousand, twenty-eight".