8538720 has 48 divisors (see below), whose sum is σ = 26898480. Its totient is φ = 2276864.

The previous prime is 8538713. The next prime is 8538721. The reversal of 8538720 is 278358.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8538721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8415 + ... + 9374.

It is an arithmetic number, because the mean of its divisors is an integer number (560385).

Almost surely, 2^8538720 is an apocalyptic number.

8538720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8538720 is an abundant number, since it is smaller than the sum of its proper divisors (18359760).

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

8538720 is a wasteful number, since it uses less digits than its factorization.

8538720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17807 (or 17799 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 8538720 is about 2922.1088275422. The cubic root of 8538720 is about 204.3921714009.

The spelling of 8538720 in words is "eight million, five hundred thirty-eight thousand, seven hundred twenty".