4891220 has 12 divisors (see below), whose sum is σ = 10271604. Its totient is φ = 1956480.

The previous prime is 4891217. The next prime is 4891241. The reversal of 4891220 is 221984.

It can be written as a sum of positive squares in 2 ways, for example, as 2829124 + 2062096 = 1682^2 + 1436^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 4891220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122261 + ... + 122300.

It is an arithmetic number, because the mean of its divisors is an integer number (855967).

Almost surely, 2^4891220 is an apocalyptic number.

It is an amenable number.

4891220 is an abundant number, since it is smaller than the sum of its proper divisors (5380384).

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

4891220 is a wasteful number, since it uses less digits than its factorization.

4891220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244570 (or 244568 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 4891220 is about 2211.6102730816. The cubic root of 4891220 is about 169.7484167927.

The spelling of 4891220 in words is "four million, eight hundred ninety-one thousand, two hundred twenty".