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28698369 = 372197991
BaseRepresentation
bin110110101111…
…0011100000001
32000000000202120
41231132130001
524321321434
62503034453
7465634500
oct155363401
960000676
1028698369
1115221567
12973ba29
135c3a6ab
143b50837
1527bd349
hex1b5e701

28698369 has 24 divisors (see below), whose sum is σ = 44782848. Its totient is φ = 16299360.

The previous prime is 28698361. The next prime is 28698389. The reversal of 28698369 is 96389682.

It is not a de Polignac number, because 28698369 - 23 = 28698361 is a prime.

It is a super-2 number, since 2×286983692 = 1647192766520322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28698361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28464 + ... + 29454.

It is an arithmetic number, because the mean of its divisors is an integer number (1865952).

Almost surely, 228698369 is an apocalyptic number.

It is an amenable number.

28698369 is a deficient number, since it is larger than the sum of its proper divisors (16084479).

28698369 is a wasteful number, since it uses less digits than its factorization.

28698369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205 (or 1198 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 51.

The square root of 28698369 is about 5357.0858682683. The cubic root of 28698369 is about 306.1627887725.

The spelling of 28698369 in words is "twenty-eight million, six hundred ninety-eight thousand, three hundred sixty-nine".

Divisors: 1 3 7 21 49 147 197 591 991 1379 2973 4137 6937 9653 20811 28959 48559 145677 195227 585681 1366589 4099767 9566123 28698369