388642 has 8 divisors (see below), whose sum is σ = 585756. Its totient is φ = 193392.

The previous prime is 388621. The next prime is 388651. The reversal of 388642 is 246883.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 251001 + 137641 = 501^2 + 371^2 .

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

It is a plaindrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328 + ... + 940.

2³⁸⁸⁶⁴² is an apocalyptic number.

388642 is a deficient number, since it is larger than the sum of its proper divisors (197114).

388642 is a wasteful number, since it uses less digits than its factorization.

388642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932.

The product of its digits is 9216, while the sum is 31.

The square root of 388642 is about 623.4115815414. The cubic root of 388642 is about 72.9765359004.

The spelling of 388642 in words is "three hundred eighty-eight thousand, six hundred forty-two".