388280 has 32 divisors (see below), whose sum is σ = 926640. Its totient is φ = 145920.

The previous prime is 388277. The next prime is 388301. The reversal of 388280 is 82883.

It is a super-2 number, since 2×388280² = 301522716800, which contains 22 as substring.

It is a nialpdrome in base 5.

It is a congruent number.

It is an unprimeable 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, 395 + ... + 965.

2³⁸⁸²⁸⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 388280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (463320).

388280 is an abundant number, since it is smaller than the sum of its proper divisors (538360).

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

388280 is a wasteful number, since it uses less digits than its factorization.

388280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599 (or 595 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 388280 is about 623.1211760164. The cubic root of 388280 is about 72.9538709007.

The spelling of 388280 in words is "three hundred eighty-eight thousand, two hundred eighty".