158432640 has 256 divisors, whose sum is σ = 549331200. Its totient is φ = 38707200.

The previous prime is 158432623. The next prime is 158432657. The reversal of 158432640 is 46234851.

It is an interprime number because it is at equal distance from previous prime (158432623) and next prime (158432657).

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 31 ways as a sum of consecutive naturals, for example, 1568590 + ... + 1568690.

It is an arithmetic number, because the mean of its divisors is an integer number (2145825).

Almost surely, 2^158432640 is an apocalyptic number.

158432640 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 158432640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274665600).

158432640 is an abundant number, since it is smaller than the sum of its proper divisors (390898560).

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

158432640 is a wasteful number, since it uses less digits than its factorization.

158432640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 158432640 is about 12587.0028203699. The cubic root of 158432640 is about 541.1050075027.

The spelling of 158432640 in words is "one hundred fifty-eight million, four hundred thirty-two thousand, six hundred forty".