3818720 has 48 divisors (see below), whose sum is σ = 9344160. Its totient is φ = 1473024.

The previous prime is 3818719. The next prime is 3818729. The reversal of 3818720 is 278183.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3818729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4229 + ... + 5051.

It is an arithmetic number, because the mean of its divisors is an integer number (194670).

Almost surely, 2^3818720 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 3818720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4672080).

3818720 is an abundant number, since it is smaller than the sum of its proper divisors (5525440).

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

3818720 is a wasteful number, since it uses less digits than its factorization.

3818720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867 (or 859 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 3818720 is about 1954.1545486476. The cubic root of 3818720 is about 156.3049044383.

The spelling of 3818720 in words is "three million, eight hundred eighteen thousand, seven hundred twenty".