3862989 has 24 divisors (see below), whose sum is σ = 6078072. Its totient is φ = 2350080.

The previous prime is 3862987. The next prime is 3862993. The reversal of 3862989 is 9892683.

It can be written as a sum of positive squares in 4 ways, for example, as 514089 + 3348900 = 717^2 + 1830^2 .

It is not a de Polignac number, because 3862989 - 2¹ = 3862987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3862987) 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, 15909 + ... + 16149.

It is an arithmetic number, because the mean of its divisors is an integer number (253253).

Almost surely, 2^3862989 is an apocalyptic number.

3862989 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

3862989 is a deficient number, since it is larger than the sum of its proper divisors (2215083).

3862989 is a wasteful number, since it uses less digits than its factorization.

3862989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397 (or 394 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 3862989 is about 1965.4488037087. The cubic root of 3862989 is about 156.9065802572.

It can be divided in two parts, 3862 and 989, that added together give a triangular number (4851 = T₉₈).

The spelling of 3862989 in words is "three million, eight hundred sixty-two thousand, nine hundred eighty-nine".