388489040 has 40 divisors (see below), whose sum is σ = 918557280. Its totient is φ = 152759936.

The previous prime is 388489037. The next prime is 388489043. The reversal of 388489040 is 40984883.

It is an interprime number because it is at equal distance from previous prime (388489037) and next prime (388489043).

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 388488982 and 388489000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388489043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36434 + ... + 45873.

It is an arithmetic number, because the mean of its divisors is an integer number (22963932).

Almost surely, 2^388489040 is an apocalyptic number.

It is an amenable number.

388489040 is an abundant number, since it is smaller than the sum of its proper divisors (530068240).

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

388489040 is a wasteful number, since it uses less digits than its factorization.

388489040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82379 (or 82373 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 388489040 is about 19710.1253166995. The cubic root of 388489040 is about 729.6696071664.

The spelling of 388489040 in words is "three hundred eighty-eight million, four hundred eighty-nine thousand, forty".