387988 has 6 divisors (see below), whose sum is σ = 678986. Its totient is φ = 193992.

The previous prime is 387977. The next prime is 388009. The reversal of 387988 is 889783.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 242064 + 145924 = 492^2 + 382^2 .

It is a plaindrome in base 11.

It is a congruent number.

It is an unprimeable number.

387988 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48495 + ... + 48502.

2³⁸⁷⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

387988 is a deficient number, since it is larger than the sum of its proper divisors (290998).

387988 is a wasteful number, since it uses less digits than its factorization.

387988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97001 (or 96999 counting only the distinct ones).

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

The square root of 387988 is about 622.8868276019. The cubic root of 387988 is about 72.9355783690.

The spelling of 387988 in words is "three hundred eighty-seven thousand, nine hundred eighty-eight".