3858855 has 64 divisors (see below), whose sum is σ = 8322048. Its totient is φ = 1474560.

The previous prime is 3858851. The next prime is 3858859. The reversal of 3858855 is 5588583.

3858855 = 88² + 89² + ... + 230².

It is an interprime number because it is at equal distance from previous prime (3858851) and next prime (3858859).

It is not a de Polignac number, because 3858855 - 2² = 3858851 is a prime.

It is a super-2 number, since 2×3858855² = 29781523822050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3858851) 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 63 ways as a sum of consecutive naturals, for example, 14887 + ... + 15143.

It is an arithmetic number, because the mean of its divisors is an integer number (130032).

Almost surely, 2^3858855 is an apocalyptic number.

3858855 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3858855 is an abundant number, since it is smaller than the sum of its proper divisors (4463193).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3858855 is a wasteful number, since it uses less digits than its factorization.

3858855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296.

The product of its digits is 192000, while the sum is 42.

The square root of 3858855 is about 1964.3968539987. The cubic root of 3858855 is about 156.8505887848.

It can be divided in two parts, 3 and 858855, that added together give a palindrome (858858).

The spelling of 3858855 in words is "three million, eight hundred fifty-eight thousand, eight hundred fifty-five".