2855390 has 8 divisors (see below), whose sum is σ = 5139720. Its totient is φ = 1142152.

The previous prime is 2855383. The next prime is 2855393. The reversal of 2855390 is 935582.

It is a happy number.

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

It is a super-4 number, since 4×2855390⁴ (a number of 27 digits) contains 4444 as substring.

It is a Curzon number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142760 + ... + 142779.

It is an arithmetic number, because the mean of its divisors is an integer number (642465).

2^2855390 is an apocalyptic number.

2855390 is a deficient number, since it is larger than the sum of its proper divisors (2284330).

2855390 is a wasteful number, since it uses less digits than its factorization.

2855390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285546.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 2855390 is about 1689.7899277721. The cubic root of 2855390 is about 141.8693170500.

The spelling of 2855390 in words is "two million, eight hundred fifty-five thousand, three hundred ninety".