3861900 has 108 divisors (see below), whose sum is σ = 13856752. Its totient is φ = 881280.

The previous prime is 3861899. The next prime is 3861911. The reversal of 3861900 is 91683.

It is a super-2 number, since 2×3861900² = 29828543220000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 5994 + ... + 6606.

Almost surely, 2^3861900 is an apocalyptic number.

3861900 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3861900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6928376).

3861900 is an abundant number, since it is smaller than the sum of its proper divisors (9994852).

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

3861900 is a wasteful number, since it uses less digits than its factorization.

3861900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640 (or 630 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 3861900 is about 1965.1717482195. The cubic root of 3861900 is about 156.8918345664.

It can be divided in two parts, 3861 and 900, that added together give a square (4761 = 69²).

The spelling of 3861900 in words is "three million, eight hundred sixty-one thousand, nine hundred".