388063440 has 80 divisors (see below), whose sum is σ = 1336670400. Its totient is φ = 103483008.

The previous prime is 388063439. The next prime is 388063463. The reversal of 388063440 is 44360883.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 388063395 and 388063404.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 87670 + ... + 91989.

It is an arithmetic number, because the mean of its divisors is an integer number (16708380).

Almost surely, 2^388063440 is an apocalyptic number.

388063440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

388063440 is an abundant number, since it is smaller than the sum of its proper divisors (948606960).

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

388063440 is a wasteful number, since it uses less digits than its factorization.

388063440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179681 (or 179669 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 388063440 is about 19699.3258767908. The cubic root of 388063440 is about 729.4030523638.

The spelling of 388063440 in words is "three hundred eighty-eight million, sixty-three thousand, four hundred forty".