2640049 has 8 divisors (see below), whose sum is σ = 2825928. Its totient is φ = 2457600.

The previous prime is 2640041. The next prime is 2640059. The reversal of 2640049 is 9400462.

It can be written as a sum of positive squares in 4 ways, for example, as 1575025 + 1065024 = 1255^2 + 1032^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2640049 - 2³ = 2640041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2640041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 849 + ... + 2449.

It is an arithmetic number, because the mean of its divisors is an integer number (353241).

2^2640049 is an apocalyptic number.

It is an amenable number.

2640049 is a deficient number, since it is larger than the sum of its proper divisors (185879).

2640049 is a wasteful number, since it uses less digits than its factorization.

2640049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715.

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

The square root of 2640049 is about 1624.8227595649. The cubic root of 2640049 is about 138.2093196726.

The spelling of 2640049 in words is "two million, six hundred forty thousand, forty-nine".