388441081 has 24 divisors (see below), whose sum is σ = 462771144. Its totient is φ = 324979200.

The previous prime is 388441049. The next prime is 388441099. The reversal of 388441081 is 180144883.

It can be written as a sum of positive squares in 4 ways, for example, as 227557225 + 160883856 = 15085^2 + 12684^2 .

It is not a de Polignac number, because 388441081 - 2⁵ = 388441049 is a prime.

It is a super-2 number, since 2×388441081² = 301772946816897122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 388441081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388445081) 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 23 ways as a sum of consecutive naturals, for example, 968481 + ... + 968881.

It is an arithmetic number, because the mean of its divisors is an integer number (19282131).

Almost surely, 2^388441081 is an apocalyptic number.

It is an amenable number.

388441081 is a deficient number, since it is larger than the sum of its proper divisors (74330063).

388441081 is a wasteful number, since it uses less digits than its factorization.

388441081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841 (or 834 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 37.

The square root of 388441081 is about 19708.9086709539. The cubic root of 388441081 is about 729.6395800089.

The spelling of 388441081 in words is "three hundred eighty-eight million, four hundred forty-one thousand, eighty-one".