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28999982 = 2111638087
BaseRepresentation
bin110111010100…
…0000100101110
32000120100111102
41232220010232
524410444412
62513323102
7501332024
oct156500456
960510442
1028999982
1115408130
129866492
136014a6b
143bcc714
15282c8c2
hex1ba812e

28999982 has 16 divisors (see below), whose sum is σ = 47751552. Its totient is φ = 13099320.

The previous prime is 28999979. The next prime is 28999991.

28999982 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458 + ... + 7629.

It is an arithmetic number, because the mean of its divisors is an integer number (2984472).

Almost surely, 228999982 is an apocalyptic number.

28999982 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28999982 is a deficient number, since it is larger than the sum of its proper divisors (18751570).

28999982 is a wasteful number, since it uses less digits than its factorization.

28999982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8263.

The product of its digits is 1679616, while the sum is 56.

The square root of 28999982 is about 5385.1631358762. The cubic root of 28999982 is about 307.2316190034.

The spelling of 28999982 in words is "twenty-eight million, nine hundred ninety-nine thousand, nine hundred eighty-two".

Divisors: 1 2 11 22 163 326 1793 3586 8087 16174 88957 177914 1318181 2636362 14499991 28999982