2604780 has 72 divisors (see below), whose sum is σ = 8190000. Its totient is φ = 669312.

The previous prime is 2604779. The next prime is 2604799. The reversal of 2604780 is 874062.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4971 + ... + 5469.

It is an arithmetic number, because the mean of its divisors is an integer number (113750).

2^2604780 is an apocalyptic number.

2604780 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 2604780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4095000).

2604780 is an abundant number, since it is smaller than the sum of its proper divisors (5585220).

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

2604780 is a wasteful number, since it uses less digits than its factorization.

2604780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 2604780 is about 1613.9330841147. The cubic root of 2604780 is about 137.5911021604.

It can be divided in two parts, 2604 and 780, that multiplied together give a triangular number (2031120 = T₂₀₁₅).

The spelling of 2604780 in words is "two million, six hundred four thousand, seven hundred eighty".