8999428 has 12 divisors (see below), whose sum is σ = 15778000. Its totient is φ = 4491432.

The previous prime is 8999423. The next prime is 8999429. The reversal of 8999428 is 8249998.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (8999423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 823 + ... + 4321.

Almost surely, 2^8999428 is an apocalyptic number.

It is an amenable number.

8999428 is a deficient number, since it is larger than the sum of its proper divisors (6778572).

8999428 is a wasteful number, since it uses less digits than its factorization.

8999428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4146 (or 4144 counting only the distinct ones).

The product of its digits is 373248, while the sum is 49.

The square root of 8999428 is about 2999.9046651519. The cubic root of 8999428 is about 208.0039755157.

The spelling of 8999428 in words is "eight million, nine hundred ninety-nine thousand, four hundred twenty-eight".