3450420 has 72 divisors (see below), whose sum is σ = 10843560. Its totient is φ = 887040.

The previous prime is 3450407. The next prime is 3450427. The reversal of 3450420 is 240543.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 767376 + 2683044 = 876^2 + 1638^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 3450393 and 3450402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3450427) 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, 4890 + ... + 5550.

It is an arithmetic number, because the mean of its divisors is an integer number (150605).

Almost surely, 2^3450420 is an apocalyptic number.

3450420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3450420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5421780).

3450420 is an abundant number, since it is smaller than the sum of its proper divisors (7393140).

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

3450420 is a wasteful number, since it uses less digits than its factorization.

3450420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705 (or 700 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 3450420 is about 1857.5306188594. The cubic root of 3450420 is about 151.1091122541.

Adding to 3450420 its reverse (240543), we get a palindrome (3690963).

The spelling of 3450420 in words is "three million, four hundred fifty thousand, four hundred twenty".