158808640 has 112 divisors (see below), whose sum is σ = 397306800. Its totient is φ = 60383232.

The previous prime is 158808623. The next prime is 158808647. The reversal of 158808640 is 46808851.

It can be written as a sum of positive squares in 8 ways, for example, as 652864 + 158155776 = 808^2 + 12576^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 158808593 and 158808602.

It is not an unprimeable number, because it can be changed into a prime (158808647) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1011442 + ... + 1011598.

Almost surely, 2^158808640 is an apocalyptic number.

158808640 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 158808640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198653400).

158808640 is an abundant number, since it is smaller than the sum of its proper divisors (238498160).

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

158808640 is a wasteful number, since it uses less digits than its factorization.

158808640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 158808640 is about 12601.9300109150. The cubic root of 158808640 is about 541.5327281722.

The spelling of 158808640 in words is "one hundred fifty-eight million, eight hundred eight thousand, six hundred forty".