8720104 has 8 divisors (see below), whose sum is σ = 16350210. Its totient is φ = 4360048.

The previous prime is 8720087. The next prime is 8720111. The reversal of 8720104 is 4010278.

It can be written as a sum of positive squares in only one way, i.e., 8468100 + 252004 = 2910^2 + 502^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544999 + ... + 545014.

Almost surely, 2^8720104 is an apocalyptic number.

It is an amenable number.

8720104 is a deficient number, since it is larger than the sum of its proper divisors (7630106).

8720104 is a wasteful number, since it uses less digits than its factorization.

8720104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090019 (or 1090015 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 8720104 is about 2952.9822214162. The cubic root of 8720104 is about 205.8293115895.

The spelling of 8720104 in words is "eight million, seven hundred twenty thousand, one hundred four".