8898721 has 8 divisors (see below), whose sum is σ = 9806720. Its totient is φ = 8022672.

The previous prime is 8898719. The next prime is 8898733. The reversal of 8898721 is 1278988.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8898721 - 2¹ = 8898719 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8898751) 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, 7401 + ... + 8518.

It is an arithmetic number, because the mean of its divisors is an integer number (1225840).

Almost surely, 2^8898721 is an apocalyptic number.

It is an amenable number.

8898721 is a deficient number, since it is larger than the sum of its proper divisors (907999).

8898721 is a wasteful number, since it uses less digits than its factorization.

8898721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15975.

The product of its digits is 64512, while the sum is 43.

The square root of 8898721 is about 2983.0724094463. The cubic root of 8898721 is about 207.2251822253.

The spelling of 8898721 in words is "eight million, eight hundred ninety-eight thousand, seven hundred twenty-one".