1385918442 has 24 divisors (see below), whose sum is σ = 3021955716. Its totient is φ = 459029376.

The previous prime is 1385918377. The next prime is 1385918447. The reversal of 1385918442 is 2448195831.

1385918442 is a `hidden beast` number, since 13 + 8 + 591 + 8 + 4 + 42 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1180540881 + 205377561 = 34359^2 + 14331^2 .

It is not an unprimeable number, because it can be changed into a prime (1385918447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 242383 + ... + 248034.

Almost surely, 2^1385918442 is an apocalyptic number.

1385918442 is an abundant number, since it is smaller than the sum of its proper divisors (1636037274).

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

1385918442 is a wasteful number, since it uses less digits than its factorization.

1385918442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490582 (or 490579 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 1385918442 is about 37227.9255667033. The cubic root of 1385918442 is about 1114.9256097353.

The spelling of 1385918442 in words is "one billion, three hundred eighty-five million, nine hundred eighteen thousand, four hundred forty-two".