8721104 has 20 divisors (see below), whose sum is σ = 19311264. Its totient is φ = 3737568.

The previous prime is 8721101. The next prime is 8721121. The reversal of 8721104 is 4011278.

It is a self number, because there is not a number n which added to its sum of digits gives 8721104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8721101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38822 + ... + 39045.

Almost surely, 2^8721104 is an apocalyptic number.

It is an amenable number.

8721104 is an abundant number, since it is smaller than the sum of its proper divisors (10590160).

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

8721104 is a wasteful number, since it uses less digits than its factorization.

8721104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77882 (or 77876 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 8721104 is about 2953.1515369178. The cubic root of 8721104 is about 205.8371792878.

The spelling of 8721104 in words is "eight million, seven hundred twenty-one thousand, one hundred four".