158721368 has 16 divisors (see below), whose sum is σ = 320495280. Its totient is φ = 73255968.

The previous prime is 158721347. The next prime is 158721371. The reversal of 158721368 is 863127851.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 762980 + ... + 763187.

It is an arithmetic number, because the mean of its divisors is an integer number (20030955).

Almost surely, 2^158721368 is an apocalyptic number.

It is an amenable number.

158721368 is an abundant number, since it is smaller than the sum of its proper divisors (161773912).

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

158721368 is a wasteful number, since it uses less digits than its factorization.

158721368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526186 (or 1526182 counting only the distinct ones).

The product of its digits is 80640, while the sum is 41.

The square root of 158721368 is about 12598.4668908562. The cubic root of 158721368 is about 541.4335116894.

The spelling of 158721368 in words is "one hundred fifty-eight million, seven hundred twenty-one thousand, three hundred sixty-eight".