8550720 has 84 divisors (see below), whose sum is σ = 29420820. Its totient is φ = 2279424.

The previous prime is 8550697. The next prime is 8550727. The reversal of 8550720 is 270558.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1065024 + 7485696 = 1032^2 + 2736^2 .

It is a super-2 number, since 2×8550720² = 146229625036800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8550727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1396 + ... + 4364.

Almost surely, 2^8550720 is an apocalyptic number.

8550720 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 8550720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14710410).

8550720 is an abundant number, since it is smaller than the sum of its proper divisors (20870100).

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

8550720 is a wasteful number, since it uses less digits than its factorization.

8550720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2992 (or 2979 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 8550720 is about 2924.1614182531. The cubic root of 8550720 is about 204.4878749713.

It can be divided in two parts, 85 and 50720, that added together give a palindrome (50805).

The spelling of 8550720 in words is "eight million, five hundred fifty thousand, seven hundred twenty".