2791855 has 16 divisors (see below), whose sum is σ = 3815424. Its totient is φ = 1941280.

The previous prime is 2791849. The next prime is 2791897. The reversal of 2791855 is 5581972.

It is not a de Polignac number, because 2791855 - 2¹³ = 2783663 is a prime.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162 + ... + 2368.

It is an arithmetic number, because the mean of its divisors is an integer number (238464).

2^2791855 is an apocalyptic number.

2791855 is a deficient number, since it is larger than the sum of its proper divisors (1023569).

2791855 is a wasteful number, since it uses less digits than its factorization.

2791855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2246.

The product of its digits is 25200, while the sum is 37.

The square root of 2791855 is about 1670.8844963073. The cubic root of 2791855 is about 140.8091746507.

The spelling of 2791855 in words is "two million, seven hundred ninety-one thousand, eight hundred fifty-five".