3855870 has 32 divisors (see below), whose sum is σ = 10283040. Its totient is φ = 1028160.

The previous prime is 3855857. The next prime is 3855913. The reversal of 3855870 is 785583.

It is a happy number.

3855870 is a `hidden beast` number, since 38 + 558 + 70 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6871 + ... + 7410.

It is an arithmetic number, because the mean of its divisors is an integer number (321345).

Almost surely, 2^3855870 is an apocalyptic number.

3855870 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3855870 is an abundant number, since it is smaller than the sum of its proper divisors (6427170).

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

3855870 is a wasteful number, since it uses less digits than its factorization.

3855870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14297 (or 14291 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 3855870 is about 1963.6369318181. The cubic root of 3855870 is about 156.8101346618.

The spelling of 3855870 in words is "three million, eight hundred fifty-five thousand, eight hundred seventy".