4385820 has 48 divisors (see below), whose sum is σ = 12475008. Its totient is φ = 1151040.

The previous prime is 4385819. The next prime is 4385837. The reversal of 4385820 is 285834.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3475 + ... + 4565.

It is an arithmetic number, because the mean of its divisors is an integer number (259896).

Almost surely, 2^4385820 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 4385820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6237504).

4385820 is an abundant number, since it is smaller than the sum of its proper divisors (8089188).

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

4385820 is a wasteful number, since it uses less digits than its factorization.

4385820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170 (or 1168 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 4385820 is about 2094.2349438399. The cubic root of 4385820 is about 163.6880347484.

The spelling of 4385820 in words is "four million, three hundred eighty-five thousand, eight hundred twenty".