388870 has 16 divisors (see below), whose sum is σ = 719568. Its totient is φ = 151200.

The previous prime is 388859. The next prime is 388879. The reversal of 388870 is 78883.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388879) by changing a digit.

388870 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 7 ways as a sum of consecutive naturals, for example, 156 + ... + 895.

It is an arithmetic number, because the mean of its divisors is an integer number (44973).

2³⁸⁸⁸⁷⁰ is an apocalyptic number.

388870 is a deficient number, since it is larger than the sum of its proper divisors (330698).

388870 is a wasteful number, since it uses less digits than its factorization.

388870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 388870 is about 623.5944194747. The cubic root of 388870 is about 72.9908038707.

The spelling of 388870 in words is "three hundred eighty-eight thousand, eight hundred seventy".