158431872 has 128 divisors (see below), whose sum is σ = 447249600. Its totient is φ = 49602560.

The previous prime is 158431841. The next prime is 158431873. The reversal of 158431872 is 278134851.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 158431872.

It is not an unprimeable number, because it can be changed into a prime (158431873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 456403 + ... + 456749.

Almost surely, 2^158431872 is an apocalyptic number.

158431872 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 158431872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223624800).

158431872 is an abundant number, since it is smaller than the sum of its proper divisors (288817728).

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

158431872 is a wasteful number, since it uses less digits than its factorization.

158431872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 422 counting only the distinct ones).

The product of its digits is 53760, while the sum is 39.

The square root of 158431872 is about 12586.9723126731. The cubic root of 158431872 is about 541.1041331683.

The spelling of 158431872 in words is "one hundred fifty-eight million, four hundred thirty-one thousand, eight hundred seventy-two".