388987 has 8 divisors (see below), whose sum is σ = 417600. Its totient is φ = 361224.

The previous prime is 388963. The next prime is 388991. The reversal of 388987 is 789883.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 388987 - 2⁷ = 388859 is a prime.

It is a Duffinian number.

388987 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 948 + ... + 1294.

It is an arithmetic number, because the mean of its divisors is an integer number (52200).

2³⁸⁸⁹⁸⁷ is an apocalyptic number.

388987 is a deficient number, since it is larger than the sum of its proper divisors (28613).

388987 is a wasteful number, since it uses less digits than its factorization.

388987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425.

The product of its digits is 96768, while the sum is 43.

The square root of 388987 is about 623.6882233937. The cubic root of 388987 is about 72.9981234271.

It can be divided in two parts, 38 and 8987, that added together give a square (9025 = 95²).

The spelling of 388987 in words is "three hundred eighty-eight thousand, nine hundred eighty-seven".