4891780 has 12 divisors (see below), whose sum is σ = 10272780. Its totient is φ = 1956704.

The previous prime is 4891763. The next prime is 4891781. The reversal of 4891780 is 871984.

It can be written as a sum of positive squares in 2 ways, for example, as 3334276 + 1557504 = 1826^2 + 1248^2 .

It is not an unprimeable number, because it can be changed into a prime (4891781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122275 + ... + 122314.

It is an arithmetic number, because the mean of its divisors is an integer number (856065).

Almost surely, 2^4891780 is an apocalyptic number.

It is an amenable number.

4891780 is an abundant number, since it is smaller than the sum of its proper divisors (5381000).

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

4891780 is a wasteful number, since it uses less digits than its factorization.

4891780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244598 (or 244596 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 4891780 is about 2211.7368740427. The cubic root of 4891780 is about 169.7548947597.

It can be divided in two parts, 4891 and 780, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 4891780 in words is "four million, eight hundred ninety-one thousand, seven hundred eighty".