3888729 has 24 divisors (see below), whose sum is σ = 6278272. Its totient is φ = 2391120.

The previous prime is 3888721. The next prime is 3888761. The reversal of 3888729 is 9278883.

It is not a de Polignac number, because 3888729 - 2³ = 3888721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3888721) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 2544 + ... + 3774.

Almost surely, 2^3888729 is an apocalyptic number.

3888729 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

3888729 is a deficient number, since it is larger than the sum of its proper divisors (2389543).

3888729 is a wasteful number, since it uses less digits than its factorization.

3888729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259 (or 1247 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 3888729 is about 1971.9860547174. The cubic root of 3888729 is about 157.2543108186.

The spelling of 3888729 in words is "three million, eight hundred eighty-eight thousand, seven hundred twenty-nine".