158731938 has 24 divisors (see below), whose sum is σ = 345267468. Its totient is φ = 52703232.

The previous prime is 158731927. The next prime is 158731957. The reversal of 158731938 is 839137851.

158731938 is a `hidden beast` number, since 1 + 587 + 31 + 9 + 38 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 150626529 + 8105409 = 12273^2 + 2847^2 .

It is a junction number, because it is equal to n+sod(n) for n = 158731893 and 158731902.

It is an unprimeable number.

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, 12531 + ... + 21782.

Almost surely, 2^158731938 is an apocalyptic number.

158731938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

158731938 is an abundant number, since it is smaller than the sum of its proper divisors (186535530).

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

158731938 is a wasteful number, since it uses less digits than its factorization.

158731938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34578 (or 34575 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 158731938 is about 12598.8863793591. The cubic root of 158731938 is about 541.4455302879.

The spelling of 158731938 in words is "one hundred fifty-eight million, seven hundred thirty-one thousand, nine hundred thirty-eight".