158609920 has 160 divisors (see below), whose sum is σ = 445471488. Its totient is φ = 53035008.

The previous prime is 158609917. The next prime is 158609963. The reversal of 158609920 is 29906851.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 949677 + ... + 949843.

Almost surely, 2^158609920 is an apocalyptic number.

158609920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158609920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222735744).

158609920 is an abundant number, since it is smaller than the sum of its proper divisors (286861568).

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

158609920 is an equidigital number, since it uses as much as digits as its factorization.

158609920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 158609920 is about 12594.0430362930. The cubic root of 158609920 is about 541.3067574670.

The spelling of 158609920 in words is "one hundred fifty-eight million, six hundred nine thousand, nine hundred twenty".