388730 has 8 divisors (see below), whose sum is σ = 699732. Its totient is φ = 155488.

The previous prime is 388727. The next prime is 388757. The reversal of 388730 is 37883.

It can be written as a sum of positive squares in 2 ways, for example, as 358801 + 29929 = 599^2 + 173^2 .

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

It is a super-2 number, since 2×388730² = 302222025800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 388693 and 388702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19427 + ... + 19446.

2³⁸⁸⁷³⁰ is an apocalyptic number.

388730 is a deficient number, since it is larger than the sum of its proper divisors (311002).

388730 is a wasteful number, since it uses less digits than its factorization.

388730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38880.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 388730 is about 623.4821569219. The cubic root of 388730 is about 72.9820434974.

The spelling of 388730 in words is "three hundred eighty-eight thousand, seven hundred thirty".