2405780 has 48 divisors (see below), whose sum is σ = 5738880. Its totient is φ = 839808.

The previous prime is 2405773. The next prime is 2405791. The reversal of 2405780 is 875042.

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 4697 + ... + 5183.

It is an arithmetic number, because the mean of its divisors is an integer number (119560).

2^2405780 is an apocalyptic number.

2405780 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 2405780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2869440).

2405780 is an abundant number, since it is smaller than the sum of its proper divisors (3333100).

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

2405780 is a wasteful number, since it uses less digits than its factorization.

2405780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528 (or 526 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 2405780 is about 1551.0577036332. The cubic root of 2405780 is about 133.9939850274.

The spelling of 2405780 in words is "two million, four hundred five thousand, seven hundred eighty".