387729 has 12 divisors (see below), whose sum is σ = 569296. Its totient is φ = 254232.

The previous prime is 387727. The next prime is 387743. The reversal of 387729 is 927783.

It is not a de Polignac number, because 387729 - 2¹ = 387727 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 387693 and 387702.

It is not an unprimeable number, because it can be changed into a prime (387721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 282 + ... + 924.

2³⁸⁷⁷²⁹ is an apocalyptic number.

It is an amenable number.

387729 is a deficient number, since it is larger than the sum of its proper divisors (181567).

387729 is a wasteful number, since it uses less digits than its factorization.

387729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716 (or 713 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 387729 is about 622.6788899585. The cubic root of 387729 is about 72.9193454617.

It can be divided in two parts, 38772 and 9, that added together give a triangular number (38781 = T₂₇₈).

The spelling of 387729 in words is "three hundred eighty-seven thousand, seven hundred twenty-nine".