158920640 has 56 divisors (see below), whose sum is σ = 379780800. Its totient is φ = 63341568.

The previous prime is 158920621. The next prime is 158920687. The reversal of 158920640 is 46029851.

It is a self number, because there is not a number n which added to its sum of digits gives 158920640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110969 + ... + 112391.

It is an arithmetic number, because the mean of its divisors is an integer number (6781800).

Almost surely, 2^158920640 is an apocalyptic number.

158920640 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 158920640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189890400).

158920640 is an abundant number, since it is smaller than the sum of its proper divisors (220860160).

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

158920640 is a wasteful number, since it uses less digits than its factorization.

158920640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789 (or 1779 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 158920640 is about 12606.3729914675. The cubic root of 158920640 is about 541.6600038102.

The spelling of 158920640 in words is "one hundred fifty-eight million, nine hundred twenty thousand, six hundred forty".