158891712 has 84 divisors (see below), whose sum is σ = 489066840. Its totient is φ = 45394944.

The previous prime is 158891701. The next prime is 158891717. The reversal of 158891712 is 217198851.

158891712 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (84).

It is a super-2 number, since 2×158891712² = 50493152284581888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (158891717) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 964 + ... + 17852.

Almost surely, 2^158891712 is an apocalyptic number.

158891712 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 158891712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244533420).

158891712 is an abundant number, since it is smaller than the sum of its proper divisors (330175128).

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

158891712 is a wasteful number, since it uses less digits than its factorization.

158891712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16918 (or 16901 counting only the distinct ones).

The product of its digits is 40320, while the sum is 42.

The square root of 158891712 is about 12605.2255830667. The cubic root of 158891712 is about 541.6271360606.

The spelling of 158891712 in words is "one hundred fifty-eight million, eight hundred ninety-one thousand, seven hundred twelve".