8728388 has 6 divisors (see below), whose sum is σ = 15274686. Its totient is φ = 4364192.

The previous prime is 8728387. The next prime is 8728397. The reversal of 8728388 is 8838278.

It can be written as a sum of positive squares in only one way, i.e., 6927424 + 1800964 = 2632^2 + 1342^2 .

It is not an unprimeable number, because it can be changed into a prime (8728381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1091045 + ... + 1091052.

It is an arithmetic number, because the mean of its divisors is an integer number (2545781).

Almost surely, 2^8728388 is an apocalyptic number.

It is an amenable number.

8728388 is a deficient number, since it is larger than the sum of its proper divisors (6546298).

8728388 is a wasteful number, since it uses less digits than its factorization.

8728388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182101 (or 2182099 counting only the distinct ones).

The product of its digits is 172032, while the sum is 44.

The square root of 8728388 is about 2954.3845382753. The cubic root of 8728388 is about 205.8944694654.

The spelling of 8728388 in words is "eight million, seven hundred twenty-eight thousand, three hundred eighty-eight".