3855289 has 8 divisors (see below), whose sum is σ = 4097160. Its totient is φ = 3620736.

The previous prime is 3855287. The next prime is 3855323. The reversal of 3855289 is 9825583.

It can be written as a sum of positive squares in 4 ways, for example, as 1016064 + 2839225 = 1008^2 + 1685^2 .

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 3855289 - 2¹ = 3855287 is a prime.

It is a Duffinian number.

3855289 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3855287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 724 + ... + 2869.

It is an arithmetic number, because the mean of its divisors is an integer number (512145).

Almost surely, 2^3855289 is an apocalyptic number.

It is an amenable number.

3855289 is a deficient number, since it is larger than the sum of its proper divisors (241871).

3855289 is a wasteful number, since it uses less digits than its factorization.

3855289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3659.

The product of its digits is 86400, while the sum is 40.

The square root of 3855289 is about 1963.4889864728. The cubic root of 3855289 is about 156.8022582496.

The spelling of 3855289 in words is "three million, eight hundred fifty-five thousand, two hundred eighty-nine".