158031720 has 192 divisors, whose sum is σ = 640448640. Its totient is φ = 32832000.

The previous prime is 158031667. The next prime is 158031733. The reversal of 158031720 is 27130851.

It is a super-3 number, since 3×158031720³ (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 47 ways as a sum of consecutive naturals, for example, 24870 + ... + 30570.

It is an arithmetic number, because the mean of its divisors is an integer number (3335670).

Almost surely, 2^158031720 is an apocalyptic number.

158031720 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 158031720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320224320).

158031720 is an abundant number, since it is smaller than the sum of its proper divisors (482416920).

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

158031720 is a wasteful number, since it uses less digits than its factorization.

158031720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5736 (or 5729 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 158031720 is about 12571.0667805083. The cubic root of 158031720 is about 540.6481928193.

The spelling of 158031720 in words is "one hundred fifty-eight million, thirty-one thousand, seven hundred twenty".