8720002 has 4 divisors (see below), whose sum is σ = 13080006. Its totient is φ = 4360000.

The previous prime is 8719999. The next prime is 8720027. The reversal of 8720002 is 2000278.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8173881 + 546121 = 2859^2 + 739^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2179999 + ... + 2180002.

Almost surely, 2^8720002 is an apocalyptic number.

8720002 is a deficient number, since it is larger than the sum of its proper divisors (4360004).

8720002 is a wasteful number, since it uses less digits than its factorization.

8720002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4360003.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 8720002 is about 2952.9649506894. The cubic root of 8720002 is about 205.8285090504.

The spelling of 8720002 in words is "eight million, seven hundred twenty thousand, two".