3420560 has 120 divisors (see below), whose sum is σ = 9802944. Its totient is φ = 1098240.

The previous prime is 3420533. The next prime is 3420563. The reversal of 3420560 is 650243.

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

It is not an unprimeable number, because it can be changed into a prime (3420563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 148709 + ... + 148731.

Almost surely, 2^3420560 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 3420560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4901472).

3420560 is an abundant number, since it is smaller than the sum of its proper divisors (6382384).

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

3420560 is a wasteful number, since it uses less digits than its factorization.

3420560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 3420560 is about 1849.4756013530. The cubic root of 3420560 is about 150.6719483708.

The spelling of 3420560 in words is "three million, four hundred twenty thousand, five hundred sixty".