3856915 has 8 divisors (see below), whose sum is σ = 4638960. Its totient is φ = 3078432.

The previous prime is 3856907. The next prime is 3856921. The reversal of 3856915 is 5196583.

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 3856915 - 2³ = 3856907 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3276 + ... + 4294.

It is an arithmetic number, because the mean of its divisors is an integer number (579870).

Almost surely, 2^3856915 is an apocalyptic number.

3856915 is a deficient number, since it is larger than the sum of its proper divisors (782045).

3856915 is a wasteful number, since it uses less digits than its factorization.

3856915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781.

The product of its digits is 32400, while the sum is 37.

The square root of 3856915 is about 1963.9030016780. The cubic root of 3856915 is about 156.8242993674.

It can be divided in two parts, 38 and 56915, that added together give a triangular number (56953 = T₃₃₇).

The spelling of 3856915 in words is "three million, eight hundred fifty-six thousand, nine hundred fifteen".