2641840 has 20 divisors (see below), whose sum is σ = 6142464. Its totient is φ = 1056704.

The previous prime is 2641831. The next prime is 2641841. The reversal of 2641840 is 481462.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (2641841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16432 + ... + 16591.

2^2641840 is an apocalyptic number.

2641840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2641840 is an abundant number, since it is smaller than the sum of its proper divisors (3500624).

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

2641840 is a wasteful number, since it uses less digits than its factorization.

2641840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33036 (or 33030 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 2641840 is about 1625.3738031604. The cubic root of 2641840 is about 138.2405661807.

It can be divided in two parts, 2641 and 840, that added together give a square (3481 = 59²).

The spelling of 2641840 in words is "two million, six hundred forty-one thousand, eight hundred forty".