2690845 has 8 divisors (see below), whose sum is σ = 3419064. Its totient is φ = 2025984.

The previous prime is 2690827. The next prime is 2690851. The reversal of 2690845 is 5480962.

It is a happy number.

2690845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 538756 + 2152089 = 734^2 + 1467^2 .

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 2690845 - 2⁷ = 2690717 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2690845.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 15744 + ... + 15913.

It is an arithmetic number, because the mean of its divisors is an integer number (427383).

2^2690845 is an apocalyptic number.

It is an amenable number.

2690845 is a deficient number, since it is larger than the sum of its proper divisors (728219).

2690845 is a wasteful number, since it uses less digits than its factorization.

2690845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31679.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 2690845 is about 1640.3795292553. The cubic root of 2690845 is about 139.0901025459.

The spelling of 2690845 in words is "two million, six hundred ninety thousand, eight hundred forty-five".