388340 has 12 divisors (see below), whose sum is σ = 815556. Its totient is φ = 155328.

The previous prime is 388319. The next prime is 388351. The reversal of 388340 is 43883.

It can be written as a sum of positive squares in 2 ways, for example, as 44944 + 343396 = 212^2 + 586^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9689 + ... + 9728.

It is an arithmetic number, because the mean of its divisors is an integer number (67963).

2³⁸⁸³⁴⁰ is an apocalyptic number.

It is an amenable number.

388340 is an abundant number, since it is smaller than the sum of its proper divisors (427216).

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

388340 is a wasteful number, since it uses less digits than its factorization.

388340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19426 (or 19424 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 388340 is about 623.1693188853. The cubic root of 388340 is about 72.9576285041.

The spelling of 388340 in words is "three hundred eighty-eight thousand, three hundred forty".