387812 has 6 divisors (see below), whose sum is σ = 678678. Its totient is φ = 193904.

The previous prime is 387799. The next prime is 387839. The reversal of 387812 is 218783.

It can be written as a sum of positive squares in only one way, i.e., 376996 + 10816 = 614^2 + 104^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

387812 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, 48473 + ... + 48480.

It is an arithmetic number, because the mean of its divisors is an integer number (113113).

2³⁸⁷⁸¹² is an apocalyptic number.

It is an amenable number.

387812 is a deficient number, since it is larger than the sum of its proper divisors (290866).

387812 is a wasteful number, since it uses less digits than its factorization.

387812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96957 (or 96955 counting only the distinct ones).

The product of its digits is 2688, while the sum is 29.

The square root of 387812 is about 622.7455339061. The cubic root of 387812 is about 72.9245483000.

Subtracting from 387812 its sum of digits (29), we obtain a palindrome (387783).

It can be divided in two parts, 38781 and 2, that added together give a palindrome (38783).

The spelling of 387812 in words is "three hundred eighty-seven thousand, eight hundred twelve".