2855391 has 32 divisors (see below), whose sum is σ = 4866048. Its totient is φ = 1446240.

The previous prime is 2855383. The next prime is 2855393. The reversal of 2855391 is 1935582.

It is not a de Polignac number, because 2855391 - 2³ = 2855383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2855393) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10726 + ... + 10988.

It is an arithmetic number, because the mean of its divisors is an integer number (152064).

2^2855391 is an apocalyptic number.

2855391 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2855391 is a deficient number, since it is larger than the sum of its proper divisors (2010657).

2855391 is a wasteful number, since it uses less digits than its factorization.

2855391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331.

The product of its digits is 10800, while the sum is 33.

The square root of 2855391 is about 1689.7902236668. The cubic root of 2855391 is about 141.8693336116.

The spelling of 2855391 in words is "two million, eight hundred fifty-five thousand, three hundred ninety-one".