158961738 has 64 divisors (see below), whose sum is σ = 356428800. Its totient is φ = 47211840.

The previous prime is 158961701. The next prime is 158961827. The reversal of 158961738 is 837169851.

It is a super-3 number, since 3×158961738³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 408448 + ... + 408836.

It is an arithmetic number, because the mean of its divisors is an integer number (5569200).

Almost surely, 2^158961738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158961738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178214400).

158961738 is an abundant number, since it is smaller than the sum of its proper divisors (197467062).

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

158961738 is a wasteful number, since it uses less digits than its factorization.

158961738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464 (or 438 counting only the distinct ones).

The product of its digits is 362880, while the sum is 48.

The square root of 158961738 is about 12608.0029346443. The cubic root of 158961738 is about 541.7066921534.

The spelling of 158961738 in words is "one hundred fifty-eight million, nine hundred sixty-one thousand, seven hundred thirty-eight".