2649040 has 20 divisors (see below), whose sum is σ = 6159204. Its totient is φ = 1059584.

The previous prime is 2649011. The next prime is 2649067. The reversal of 2649040 is 409462.

It can be written as a sum of positive squares in 2 ways, for example, as 788544 + 1860496 = 888^2 + 1364^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 2648996 and 2649014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16477 + ... + 16636.

2^2649040 is an apocalyptic number.

2649040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2649040 is an abundant number, since it is smaller than the sum of its proper divisors (3510164).

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

2649040 is a wasteful number, since it uses less digits than its factorization.

2649040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33126 (or 33120 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 2649040 is about 1627.5871712446. The cubic root of 2649040 is about 138.3660379763.

The spelling of 2649040 in words is "two million, six hundred forty-nine thousand, forty".