2640619 has 4 divisors (see below), whose sum is σ = 2690496. Its totient is φ = 2590744.

The previous prime is 2640581. The next prime is 2640643. The reversal of 2640619 is 9160462.

2640619 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2640619 is a prime.

It is a super-2 number, since 2×2640619² = 13945737406322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2640689) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 24859 + ... + 24964.

It is an arithmetic number, because the mean of its divisors is an integer number (672624).

2^2640619 is an apocalyptic number.

2640619 is a deficient number, since it is larger than the sum of its proper divisors (49877).

2640619 is an equidigital number, since it uses as much as digits as its factorization.

2640619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49876.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 2640619 is about 1624.9981538451. The cubic root of 2640619 is about 138.2192656550.

The spelling of 2640619 in words is "two million, six hundred forty thousand, six hundred nineteen".