163938042 has 36 divisors (see below), whose sum is σ = 374892570. Its totient is φ = 51767856.

The previous prime is 163938037. The next prime is 163938067. The reversal of 163938042 is 240839361.

It can be written as a sum of positive squares in only one way, i.e., 161569521 + 2368521 = 12711^2 + 1539^2 .

It is a super-2 number, since 2×163938042² = 53751363229587528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 163937988 and 163938006.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6117 + ... + 19112.

Almost surely, 2^163938042 is an apocalyptic number.

163938042 is an abundant number, since it is smaller than the sum of its proper divisors (210954528).

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

163938042 is a wasteful number, since it uses less digits than its factorization.

163938042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25275 (or 25253 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 163938042 is about 12803.8291928626. The cubic root of 163938042 is about 547.3014279576.

The spelling of 163938042 in words is "one hundred sixty-three million, nine hundred thirty-eight thousand, forty-two".