388135844 has 6 divisors (see below), whose sum is σ = 679237734. Its totient is φ = 194067920.

The previous prime is 388135793. The next prime is 388135859. The reversal of 388135844 is 448531883.

It can be written as a sum of positive squares in only one way, i.e., 273902500 + 114233344 = 16550^2 + 10688^2 .

It is a junction number, because it is equal to n+sod(n) for n = 388135795 and 388135804.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48516977 + ... + 48516984.

It is an arithmetic number, because the mean of its divisors is an integer number (113206289).

Almost surely, 2^388135844 is an apocalyptic number.

It is an amenable number.

388135844 is a deficient number, since it is larger than the sum of its proper divisors (291101890).

388135844 is a wasteful number, since it uses less digits than its factorization.

388135844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97033965 (or 97033963 counting only the distinct ones).

The product of its digits is 368640, while the sum is 44.

The square root of 388135844 is about 19701.1635189397. The cubic root of 388135844 is about 729.4484130007.

The spelling of 388135844 in words is "three hundred eighty-eight million, one hundred thirty-five thousand, eight hundred forty-four".