2455720 has 48 divisors (see below), whose sum is σ = 5800860. Its totient is φ = 935424.

The previous prime is 2455711. The next prime is 2455723. The reversal of 2455720 is 275542.

It can be written as a sum of positive squares in 6 ways, for example, as 1196836 + 1258884 = 1094^2 + 1122^2 .

It is not an unprimeable number, because it can be changed into a prime (2455723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33604 + ... + 33676.

2^2455720 is an apocalyptic number.

2455720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2455720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2900430).

2455720 is an abundant number, since it is smaller than the sum of its proper divisors (3345140).

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

2455720 is a wasteful number, since it uses less digits than its factorization.

2455720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 2455720 is about 1567.0737059883. The cubic root of 2455720 is about 134.9148067888.

The spelling of 2455720 in words is "two million, four hundred fifty-five thousand, seven hundred twenty".