4721780 has 48 divisors (see below), whose sum is σ = 11733120. Its totient is φ = 1561728.

The previous prime is 4721779. The next prime is 4721791. The reversal of 4721780 is 871274.

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

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, 3479 + ... + 4641.

It is an arithmetic number, because the mean of its divisors is an integer number (244440).

Almost surely, 2^4721780 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 4721780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5866560).

4721780 is an abundant number, since it is smaller than the sum of its proper divisors (7011340).

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

4721780 is a wasteful number, since it uses less digits than its factorization.

4721780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208 (or 1206 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 4721780 is about 2172.9657153301. The cubic root of 4721780 is about 167.7652143601.

The spelling of 4721780 in words is "four million, seven hundred twenty-one thousand, seven hundred eighty".