388243442 has 16 divisors (see below), whose sum is σ = 617402112. Its totient is φ = 182781360.

The previous prime is 388243441. The next prime is 388243447. The reversal of 388243442 is 244342883.

It is a junction number, because it is equal to n+sod(n) for n = 388243396 and 388243405.

It is not an unprimeable number, because it can be changed into a prime (388243441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82328 + ... + 86915.

It is an arithmetic number, because the mean of its divisors is an integer number (38587632).

Almost surely, 2^388243442 is an apocalyptic number.

388243442 is a deficient number, since it is larger than the sum of its proper divisors (229158670).

388243442 is a wasteful number, since it uses less digits than its factorization.

388243442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169313.

The product of its digits is 147456, while the sum is 38.

The square root of 388243442 is about 19703.8940821351. The cubic root of 388243442 is about 729.5158120312.

The spelling of 388243442 in words is "three hundred eighty-eight million, two hundred forty-three thousand, four hundred forty-two".