4661820 has 96 divisors (see below), whose sum is σ = 14817600. Its totient is φ = 1216512.

The previous prime is 4661819. The next prime is 4661849. The reversal of 4661820 is 281664.

4661820 is a `hidden beast` number, since 46 + 618 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48012 + ... + 48108.

It is an arithmetic number, because the mean of its divisors is an integer number (154350).

Almost surely, 2^4661820 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 4661820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7408800).

4661820 is an abundant number, since it is smaller than the sum of its proper divisors (10155780).

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

4661820 is a wasteful number, since it uses less digits than its factorization.

4661820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 4661820 is about 2159.1248227002. The cubic root of 4661820 is about 167.0520592595.

The spelling of 4661820 in words is "four million, six hundred sixty-one thousand, eight hundred twenty".