387784 has 8 divisors (see below), whose sum is σ = 727110. Its totient is φ = 193888.

The previous prime is 387781. The next prime is 387791. The reversal of 387784 is 487783.

387784 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 386884 + 900 = 622^2 + 30^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (387781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24229 + ... + 24244.

2³⁸⁷⁷⁸⁴ is an apocalyptic number.

It is an amenable number.

387784 is a deficient number, since it is larger than the sum of its proper divisors (339326).

387784 is a wasteful number, since it uses less digits than its factorization.

387784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48479 (or 48475 counting only the distinct ones).

The product of its digits is 37632, while the sum is 37.

The square root of 387784 is about 622.7230524077. The cubic root of 387784 is about 72.9227932086.

Subtracting 387784 from its reverse (487783), we obtain a palindrome (99999).

The spelling of 387784 in words is "three hundred eighty-seven thousand, seven hundred eighty-four".