2640607 has 4 divisors (see below), whose sum is σ = 2755440. Its totient is φ = 2525776.

The previous prime is 2640581. The next prime is 2640643. The reversal of 2640607 is 7060462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7060462 = 2 ⋅3530231.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2640607 is a prime.

It is a Duffinian number.

2640607 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640707) 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, 57382 + ... + 57427.

It is an arithmetic number, because the mean of its divisors is an integer number (688860).

2^2640607 is an apocalyptic number.

2640607 is a deficient number, since it is larger than the sum of its proper divisors (114833).

2640607 is a wasteful number, since it uses less digits than its factorization.

2640607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114832.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 2640607 is about 1624.9944615290. The cubic root of 2640607 is about 138.2190562807.

The spelling of 2640607 in words is "two million, six hundred forty thousand, six hundred seven".