158987520 has 216 divisors, whose sum is σ = 566461896. Its totient is φ = 41140224.

The previous prime is 158987473. The next prime is 158987539. The reversal of 158987520 is 25789851.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 46457856 + 112529664 = 6816^2 + 10608^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 426054 + ... + 426426.

Almost surely, 2^158987520 is an apocalyptic number.

158987520 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 158987520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283230948).

158987520 is an abundant number, since it is smaller than the sum of its proper divisors (407474376).

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

158987520 is a wasteful number, since it uses less digits than its factorization.

158987520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437 (or 420 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 45.

The square root of 158987520 is about 12609.0253390181. The cubic root of 158987520 is about 541.7359770348.

The spelling of 158987520 in words is "one hundred fifty-eight million, nine hundred eighty-seven thousand, five hundred twenty".