158178738 has 24 divisors (see below), whose sum is σ = 324282384. Its totient is φ = 51436960.

The previous prime is 158178719. The next prime is 158178739. The reversal of 158178738 is 837871851.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (158178739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2245 + ... + 17927.

It is an arithmetic number, because the mean of its divisors is an integer number (13511766).

Almost surely, 2^158178738 is an apocalyptic number.

158178738 is an abundant number, since it is smaller than the sum of its proper divisors (166103646).

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

158178738 is a wasteful number, since it uses less digits than its factorization.

158178738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15770 (or 15729 counting only the distinct ones).

The product of its digits is 376320, while the sum is 48.

The square root of 158178738 is about 12576.9128962556. The cubic root of 158178738 is about 540.8157971041.

The spelling of 158178738 in words is "one hundred fifty-eight million, one hundred seventy-eight thousand, seven hundred thirty-eight".