158391198 has 24 divisors (see below), whose sum is σ = 392207088. Its totient is φ = 45254592.

The previous prime is 158391161. The next prime is 158391229. The reversal of 158391198 is 891193851.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 628411 + ... + 628662.

It is an arithmetic number, because the mean of its divisors is an integer number (16341962).

Almost surely, 2^158391198 is an apocalyptic number.

158391198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

158391198 is an abundant number, since it is smaller than the sum of its proper divisors (233815890).

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

158391198 is a wasteful number, since it uses less digits than its factorization.

158391198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257088 (or 1257085 counting only the distinct ones).

The product of its digits is 77760, while the sum is 45.

The square root of 158391198 is about 12585.3564907793. The cubic root of 158391198 is about 541.0578235613.

The spelling of 158391198 in words is "one hundred fifty-eight million, three hundred ninety-one thousand, one hundred ninety-eight".