3404720 has 80 divisors (see below), whose sum is σ = 8919072. Its totient is φ = 1198080.

The previous prime is 3404719. The next prime is 3404729. The reversal of 3404720 is 274043.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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 = 3404692 and 3404701.

It is not an unprimeable number, because it can be changed into a prime (3404729) 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, 46604 + ... + 46676.

Almost surely, 2^3404720 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 3404720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4459536).

3404720 is an abundant number, since it is smaller than the sum of its proper divisors (5514352).

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

3404720 is a wasteful number, since it uses less digits than its factorization.

3404720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 3404720 is about 1845.1883372708. The cubic root of 3404720 is about 150.4390101766.

3404720 divided by its sum of digits (20) gives a triangular number (170236 = T₅₈₃).

Adding to 3404720 its reverse (274043), we get a palindrome (3678763).

The spelling of 3404720 in words is "three million, four hundred four thousand, seven hundred twenty".