158011980 has 96 divisors (see below), whose sum is σ = 532277760. Its totient is φ = 34214400.

The previous prime is 158011969. The next prime is 158011993. The reversal of 158011980 is 89110851.

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, 1921 + ... + 17880.

It is an arithmetic number, because the mean of its divisors is an integer number (5544560).

Almost surely, 2^158011980 is an apocalyptic number.

158011980 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 158011980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266138880).

158011980 is an abundant number, since it is smaller than the sum of its proper divisors (374265780).

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

158011980 is a wasteful number, since it uses less digits than its factorization.

158011980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19839 (or 19837 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 33.

The square root of 158011980 is about 12570.2816197570. The cubic root of 158011980 is about 540.6256807993.

The spelling of 158011980 in words is "one hundred fifty-eight million, eleven thousand, nine hundred eighty".