3857868 has 90 divisors (see below), whose sum is σ = 11780076. Its totient is φ = 1102248.

The previous prime is 3857863. The next prime is 3857869. The reversal of 3857868 is 8687583.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

Its product of digits (322560) is a multiple of the sum of its prime divisors (12).

It is not an unprimeable number, because it can be changed into a prime (3857863) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 551121 + ... + 551127.

Almost surely, 2^3857868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3857868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5890038).

3857868 is an abundant number, since it is smaller than the sum of its proper divisors (7922208).

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

3857868 is an frugal number, since it uses more digits than its factorization.

3857868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45 (or 12 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 3857868 is about 1964.1456157831. The cubic root of 3857868 is about 156.8372148062.

The spelling of 3857868 in words is "three million, eight hundred fifty-seven thousand, eight hundred sixty-eight".