8720418 has 16 divisors (see below), whose sum is σ = 19932480. Its totient is φ = 2491536.

The previous prime is 8720417. The next prime is 8720429. The reversal of 8720418 is 8140278.

It is not an unprimeable number, because it can be changed into a prime (8720417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103773 + ... + 103856.

It is an arithmetic number, because the mean of its divisors is an integer number (1245780).

Almost surely, 2^8720418 is an apocalyptic number.

8720418 is an abundant number, since it is smaller than the sum of its proper divisors (11212062).

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

8720418 is a wasteful number, since it uses less digits than its factorization.

8720418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207641.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 8720418 is about 2953.0353875292. The cubic root of 8720418 is about 205.8317821115.

The spelling of 8720418 in words is "eight million, seven hundred twenty thousand, four hundred eighteen".