158321280 has 128 divisors (see below), whose sum is σ = 543553920. Its totient is φ = 38965248.

The previous prime is 158321279. The next prime is 158321287. The reversal of 158321280 is 82123851.

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

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (158321287) 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, 21789 + ... + 28131.

It is an arithmetic number, because the mean of its divisors is an integer number (4246515).

Almost surely, 2^158321280 is an apocalyptic number.

158321280 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 158321280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271776960).

158321280 is an abundant number, since it is smaller than the sum of its proper divisors (385232640).

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

158321280 is a wasteful number, since it uses less digits than its factorization.

158321280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6378 (or 6366 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 158321280 is about 12582.5784321021. The cubic root of 158321280 is about 540.9781995058.

The spelling of 158321280 in words is "one hundred fifty-eight million, three hundred twenty-one thousand, two hundred eighty".