3857864 has 8 divisors (see below), whose sum is σ = 7233510. Its totient is φ = 1928928.

The previous prime is 3857863. The next prime is 3857869. The reversal of 3857864 is 4687583.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3648100 + 209764 = 1910^2 + 458^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×3857864² = 29766229284992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3857863) 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 as a sum of consecutive naturals, namely, 241109 + ... + 241124.

Almost surely, 2^3857864 is an apocalyptic number.

It is an amenable number.

3857864 is a deficient number, since it is larger than the sum of its proper divisors (3375646).

3857864 is a wasteful number, since it uses less digits than its factorization.

3857864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482239 (or 482235 counting only the distinct ones).

The product of its digits is 161280, while the sum is 41.

The square root of 3857864 is about 1964.1445975284. The cubic root of 3857864 is about 156.8371606011.

The spelling of 3857864 in words is "three million, eight hundred fifty-seven thousand, eight hundred sixty-four".