387442 has 12 divisors (see below), whose sum is σ = 639198. Its totient is φ = 176000.

The previous prime is 387437. The next prime is 387449. The reversal of 387442 is 244783.

It can be written as a sum of positive squares in only one way, i.e., 203401 + 184041 = 451^2 + 429^2 .

It is a super-2 number, since 2×387442² = 300222606728, which contains 22 as substring.

It is a d-powerful number, because it can be written as 3⁸ + 8³ + 4³ + 7⁶ + 4⁹ + 2⁹ .

It is a self number, because there is not a number n which added to its sum of digits gives 387442.

It is not an unprimeable number, because it can be changed into a prime (387449) by changing a digit.

387442 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 in 5 ways as a sum of consecutive naturals, for example, 559 + ... + 1042.

2³⁸⁷⁴⁴² is an apocalyptic number.

387442 is a deficient number, since it is larger than the sum of its proper divisors (251756).

387442 is a wasteful number, since it uses less digits than its factorization.

387442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625 (or 1614 counting only the distinct ones).

The product of its digits is 5376, while the sum is 28.

The square root of 387442 is about 622.4483914350. The cubic root of 387442 is about 72.9013491997.

It can be divided in two parts, 3874 and 42, that added together give a triangular number (3916 = T₈₈).

The spelling of 387442 in words is "three hundred eighty-seven thousand, four hundred forty-two".