388770 has 16 divisors (see below), whose sum is σ = 933120. Its totient is φ = 103664.

The previous prime is 388757. The next prime is 388777. The reversal of 388770 is 77883.

388770 is nontrivially palindromic in base 9.

It is a super-2 number, since 2×388770² = 302284225800, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (388777) by changing a digit.

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, 6450 + ... + 6509.

It is an arithmetic number, because the mean of its divisors is an integer number (58320).

2³⁸⁸⁷⁷⁰ is an apocalyptic number.

388770 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

388770 is an abundant number, since it is smaller than the sum of its proper divisors (544350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

388770 is a wasteful number, since it uses less digits than its factorization.

388770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12969.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 388770 is about 623.5142339995. The cubic root of 388770 is about 72.9845466758.

The spelling of 388770 in words is "three hundred eighty-eight thousand, seven hundred seventy".