388536340 has 12 divisors (see below), whose sum is σ = 815926356. Its totient is φ = 155414528.

The previous prime is 388536331. The next prime is 388536349. The reversal of 388536340 is 43635883.

It is an interprime number because it is at equal distance from previous prime (388536331) and next prime (388536349).

It can be written as a sum of positive squares in 2 ways, for example, as 255872016 + 132664324 = 15996^2 + 11518^2 .

It is a junction number, because it is equal to n+sod(n) for n = 388536293 and 388536302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388536349) 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 3 ways as a sum of consecutive naturals, for example, 9713389 + ... + 9713428.

It is an arithmetic number, because the mean of its divisors is an integer number (67993863).

Almost surely, 2^388536340 is an apocalyptic number.

It is an amenable number.

388536340 is an abundant number, since it is smaller than the sum of its proper divisors (427390016).

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

388536340 is a wasteful number, since it uses less digits than its factorization.

388536340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19426826 (or 19426824 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 388536340 is about 19711.3251710787. The cubic root of 388536340 is about 729.6992193032.

The spelling of 388536340 in words is "three hundred eighty-eight million, five hundred thirty-six thousand, three hundred forty".