2421780 has 48 divisors (see below), whose sum is σ = 6849024. Its totient is φ = 639360.

The previous prime is 2421767. The next prime is 2421781. The reversal of 2421780 is 871242.

It is a self number, because there is not a number n which added to its sum of digits gives 2421780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2421781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10749 + ... + 10971.

It is an arithmetic number, because the mean of its divisors is an integer number (142688).

2^2421780 is an apocalyptic number.

2421780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2421780 is an abundant number, since it is smaller than the sum of its proper divisors (4427244).

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

2421780 is a wasteful number, since it uses less digits than its factorization.

2421780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416 (or 414 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 2421780 is about 1556.2069271148. The cubic root of 2421780 is about 134.2903779449.

The spelling of 2421780 in words is "two million, four hundred twenty-one thousand, seven hundred eighty".