388561 has 4 divisors (see below), whose sum is σ = 390052. Its totient is φ = 387072.

The previous prime is 388541. The next prime is 388567. The reversal of 388561 is 165883.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 207936 + 180625 = 456^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 388561 - 2⁵ = 388529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240 + ... + 913.

It is an arithmetic number, because the mean of its divisors is an integer number (97513).

2³⁸⁸⁵⁶¹ is an apocalyptic number.

It is an amenable number.

388561 is a deficient number, since it is larger than the sum of its proper divisors (1491).

388561 is a wasteful number, since it uses less digits than its factorization.

388561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1490.

The product of its digits is 5760, while the sum is 31.

The square root of 388561 is about 623.3466130493. The cubic root of 388561 is about 72.9714656728.

It can be divided in two parts, 388 and 561, that added together give a palindrome (949).

The spelling of 388561 in words is "three hundred eighty-eight thousand, five hundred sixty-one".