3870009 has 48 divisors (see below), whose sum is σ = 6849024. Its totient is φ = 2073600.

The previous prime is 3870001. The next prime is 3870011. The reversal of 3870009 is 9000783.

It is a happy number.

It is not a de Polignac number, because 3870009 - 2³ = 3870001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3870001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39849 + ... + 39945.

It is an arithmetic number, because the mean of its divisors is an integer number (142688).

Almost surely, 2^3870009 is an apocalyptic number.

3870009 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

3870009 is a deficient number, since it is larger than the sum of its proper divisors (2979015).

3870009 is a wasteful number, since it uses less digits than its factorization.

3870009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 3870009 is about 1967.2338447678. The cubic root of 3870009 is about 157.0015686754.

The spelling of 3870009 in words is "three million, eight hundred seventy thousand, nine".