2601640 has 32 divisors (see below), whose sum is σ = 5901480. Its totient is φ = 1032192.

The previous prime is 2601617. The next prime is 2601661. The reversal of 2601640 is 461062.

2601640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1473796 + 1127844 = 1214^2 + 1062^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7552 + ... + 7888.

2^2601640 is an apocalyptic number.

2601640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2601640 is an abundant number, since it is smaller than the sum of its proper divisors (3299840).

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

2601640 is a wasteful number, since it uses less digits than its factorization.

2601640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2601640 is about 1612.9600119036. The cubic root of 2601640 is about 137.5357923351.

The spelling of 2601640 in words is "two million, six hundred one thousand, six hundred forty".