842155938 has 24 divisors (see below), whose sum is σ = 1965031068. Its totient is φ = 259124832.

The previous prime is 842155933. The next prime is 842155957. The reversal of 842155938 is 839551248.

842155938 is a `hidden beast` number, since 8 + 42 + 15 + 593 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 717543369 + 124612569 = 26787^2 + 11163^2 .

It is a junction number, because it is equal to n+sod(n) for n = 842155893 and 842155902.

It is not an unprimeable number, because it can be changed into a prime (842155933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1799245 + ... + 1799712.

Almost surely, 2^842155938 is an apocalyptic number.

842155938 is an abundant number, since it is smaller than the sum of its proper divisors (1122875130).

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

842155938 is a wasteful number, since it uses less digits than its factorization.

842155938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3598978 (or 3598975 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 842155938 is about 29019.9231218830. The cubic root of 842155938 is about 944.3453330838.

The spelling of 842155938 in words is "eight hundred forty-two million, one hundred fifty-five thousand, nine hundred thirty-eight".