2855999 has 8 divisors (see below), whose sum is σ = 2970240. Its totient is φ = 2743200.

The previous prime is 2855989. The next prime is 2856001. The reversal of 2855999 is 9995582.

2855999 = T₂₇₂ + T₂₇₃ + ... + T₃₃₃.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2855999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2855989) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5357 + ... + 5865.

It is an arithmetic number, because the mean of its divisors is an integer number (371280).

2^2855999 is an apocalyptic number.

2855999 is a deficient number, since it is larger than the sum of its proper divisors (114241).

2855999 is a wasteful number, since it uses less digits than its factorization.

2855999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721.

The product of its digits is 291600, while the sum is 47.

The square root of 2855999 is about 1689.9701180790. The cubic root of 2855999 is about 141.8794023358.

The spelling of 2855999 in words is "two million, eight hundred fifty-five thousand, nine hundred ninety-nine".