388747 has 4 divisors (see below), whose sum is σ = 391936. Its totient is φ = 385560.

The previous prime is 388727. The next prime is 388757. The reversal of 388747 is 747883.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-388747 is a prime.

It is a super-2 number, since 2×388747² = 302248460018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1404 + ... + 1657.

It is an arithmetic number, because the mean of its divisors is an integer number (97984).

2³⁸⁸⁷⁴⁷ is an apocalyptic number.

388747 is a deficient number, since it is larger than the sum of its proper divisors (3189).

388747 is a wasteful number, since it uses less digits than its factorization.

388747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3188.

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

The square root of 388747 is about 623.4957898815. The cubic root of 388747 is about 72.9831073692.

The spelling of 388747 in words is "three hundred eighty-eight thousand, seven hundred forty-seven".