158771988 has 60 divisors (see below), whose sum is σ = 420383040. Its totient is φ = 52245648.

The previous prime is 158771981. The next prime is 158771989. The reversal of 158771988 is 889177851.

158771988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158771981) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22495 + ... + 28697.

It is an arithmetic number, because the mean of its divisors is an integer number (7006384).

Almost surely, 2^158771988 is an apocalyptic number.

158771988 is a gapful number since it is divisible by the number (18) 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 158771988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210191520).

158771988 is an abundant number, since it is smaller than the sum of its proper divisors (261611052).

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

158771988 is a wasteful number, since it uses less digits than its factorization.

158771988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6298 (or 6287 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 54.

The square root of 158771988 is about 12600.4757053057. The cubic root of 158771988 is about 541.4910642244.

The spelling of 158771988 in words is "one hundred fifty-eight million, seven hundred seventy-one thousand, nine hundred eighty-eight".