3893729 has 8 divisors (see below), whose sum is σ = 4558848. Its totient is φ = 3255840.

The previous prime is 3893719. The next prime is 3893741. The reversal of 3893729 is 9273983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-3893729 is a prime.

It is a super-2 number, since 2×3893729² = 30322251050882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (3893719) 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 7 ways as a sum of consecutive naturals, for example, 6497 + ... + 7070.

It is an arithmetic number, because the mean of its divisors is an integer number (569856).

Almost surely, 2^3893729 is an apocalyptic number.

It is an amenable number.

3893729 is a deficient number, since it is larger than the sum of its proper divisors (665119).

3893729 is a wasteful number, since it uses less digits than its factorization.

3893729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13615.

The product of its digits is 81648, while the sum is 41.

The square root of 3893729 is about 1973.2534049128. The cubic root of 3893729 is about 157.3216794290.

The spelling of 3893729 in words is "three million, eight hundred ninety-three thousand, seven hundred twenty-nine".