4787820 has 72 divisors (see below), whose sum is σ = 14776944. Its totient is φ = 1254528.

The previous prime is 4787803. The next prime is 4787831. The reversal of 4787820 is 287874.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11862 + ... + 12258.

Almost surely, 2^4787820 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 4787820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7388472).

4787820 is an abundant number, since it is smaller than the sum of its proper divisors (9989124).

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

4787820 is a wasteful number, since it uses less digits than its factorization.

4787820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479 (or 474 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 4787820 is about 2188.1087724334. The cubic root of 4787820 is about 168.5437315133.

The spelling of 4787820 in words is "four million, seven hundred eighty-seven thousand, eight hundred twenty".