3861949 has 24 divisors (see below), whose sum is σ = 5042688. Its totient is φ = 2877120.

The previous prime is 3861929. The next prime is 3861961. The reversal of 3861949 is 9491683.

It is not a de Polignac number, because 3861949 - 2⁷ = 3861821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3861929) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104359 + ... + 104395.

It is an arithmetic number, because the mean of its divisors is an integer number (210112).

Almost surely, 2^3861949 is an apocalyptic number.

It is an amenable number.

3861949 is a deficient number, since it is larger than the sum of its proper divisors (1180739).

3861949 is a wasteful number, since it uses less digits than its factorization.

3861949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 88 counting only the distinct ones).

The product of its digits is 46656, while the sum is 40.

The square root of 3861949 is about 1965.1842152836. The cubic root of 3861949 is about 156.8924981143.

The spelling of 3861949 in words is "three million, eight hundred sixty-one thousand, nine hundred forty-nine".