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9000028 = 223760811
BaseRepresentation
bin100010010101…
…010001011100
3121221020201101
4202111101130
54301000103
6520522444
7136333102
oct42252134
917836641
109000028
115097944
123020424
131b3167b
1412a3c72
15bcba1d
hex89545c

9000028 has 12 divisors (see below), whose sum is σ = 16175992. Its totient is φ = 4378320.

The previous prime is 9000011. The next prime is 9000041. The reversal of 9000028 is 8200009.

It is a junction number, because it is equal to n+sod(n) for n = 8999969 and 9000014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30258 + ... + 30553.

Almost surely, 29000028 is an apocalyptic number.

It is an amenable number.

9000028 is a deficient number, since it is larger than the sum of its proper divisors (7175964).

9000028 is a wasteful number, since it uses less digits than its factorization.

9000028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60852 (or 60850 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 9000028 is about 3000.0046666630. The cubic root of 9000028 is about 208.0085980174.

Subtracting from 9000028 its sum of digits (19), we obtain a palindrome (9000009).

The spelling of 9000028 in words is "nine million, twenty-eight", and thus it is an aban number and an uban number.

Divisors: 1 2 4 37 74 148 60811 121622 243244 2250007 4500014 9000028