158781132 has 72 divisors (see below), whose sum is σ = 420201600. Its totient is φ = 50492160.

The previous prime is 158781127. The next prime is 158781149. The reversal of 158781132 is 231187851.

It is a super-2 number, since 2×158781132² = 50422895758402848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80494 + ... + 82442.

Almost surely, 2^158781132 is an apocalyptic number.

158781132 is a gapful number since it is divisible by the number (12) 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 158781132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210100800).

158781132 is an abundant number, since it is smaller than the sum of its proper divisors (261420468).

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

158781132 is a wasteful number, since it uses less digits than its factorization.

158781132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2063 (or 2058 counting only the distinct ones).

The product of its digits is 13440, while the sum is 36.

The square root of 158781132 is about 12600.8385435256. The cubic root of 158781132 is about 541.5014592134.

The spelling of 158781132 in words is "one hundred fifty-eight million, seven hundred eighty-one thousand, one hundred thirty-two".