8158720 has 40 divisors (see below), whose sum is σ = 19567944. Its totient is φ = 3262464.

The previous prime is 8158669. The next prime is 8158727. The reversal of 8158720 is 278518.

It is a tau number, because it is divible by the number of its divisors (40).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8158727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 967 + ... + 4153.

Almost surely, 2^8158720 is an apocalyptic number.

8158720 is a gapful number since it is divisible by the number (80) 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 8158720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9783972).

8158720 is an abundant number, since it is smaller than the sum of its proper divisors (11409224).

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

8158720 is an equidigital number, since it uses as much as digits as its factorization.

8158720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3210 (or 3194 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 8158720 is about 2856.3473178169. The cubic root of 8158720 is about 201.3140145881.

The spelling of 8158720 in words is "eight million, one hundred fifty-eight thousand, seven hundred twenty".