3204720 has 60 divisors (see below), whose sum is σ = 10764936. Its totient is φ = 854400.

The previous prime is 3204701. The next prime is 3204739. The reversal of 3204720 is 274023.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3204701) and next prime (3204739).

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-3 number, since 3×3204720³ = 98739637133382144000, which contains 333 as substring.

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

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 3204693 and 3204702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1506 + ... + 2945.

Almost surely, 2^3204720 is an apocalyptic number.

3204720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3204720 is an abundant number, since it is smaller than the sum of its proper divisors (7560216).

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

3204720 is a wasteful number, since it uses less digits than its factorization.

3204720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4470 (or 4461 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 3204720 is about 1790.1731759805. The cubic root of 3204720 is about 147.4336769717.

Adding to 3204720 its reverse (274023), we get a palindrome (3478743).

The spelling of 3204720 in words is "three million, two hundred four thousand, seven hundred twenty".