2604690 has 64 divisors (see below), whose sum is σ = 7585920. Its totient is φ = 630720.

The previous prime is 2604683. The next prime is 2604703. The reversal of 2604690 is 964062.

It is a super-2 number, since 2×2604690² = 13568819992200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2532 + ... + 3408.

It is an arithmetic number, because the mean of its divisors is an integer number (118530).

2^2604690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2604690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3792960).

2604690 is an abundant number, since it is smaller than the sum of its proper divisors (4981230).

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

2604690 is a wasteful number, since it uses less digits than its factorization.

2604690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904 (or 898 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 2604690 is about 1613.9052016770. The cubic root of 2604690 is about 137.5895174658.

It can be divided in two parts, 260 and 4690, that added together give a triangular number (4950 = T₉₉).

The spelling of 2604690 in words is "two million, six hundred four thousand, six hundred ninety".