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28993059 = 310491
BaseRepresentation
bin110111010011…
…0011000100011
32000120000000000
41232212120203
524410234214
62513231043
7501302604
oct156463043
960500000
1028993059
1115402a07
129862483
136011874
143bc9dab
15282a809
hex1ba6623

28993059 has 22 divisors (see below), whose sum is σ = 43577916. Its totient is φ = 19289340.

The previous prime is 28993049. The next prime is 28993093. The reversal of 28993059 is 95039982.

It is not a de Polignac number, because 28993059 - 24 = 28993043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28993049) 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 21 ways as a sum of consecutive naturals, for example, 58804 + ... + 59294.

Almost surely, 228993059 is an apocalyptic number.

28993059 is a deficient number, since it is larger than the sum of its proper divisors (14584857).

28993059 is an frugal number, since it uses more digits than its factorization.

28993059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521 (or 494 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 28993059 is about 5384.5203128970. The cubic root of 28993059 is about 307.2071691747.

The spelling of 28993059 in words is "twenty-eight million, nine hundred ninety-three thousand, fifty-nine".

Divisors: 1 3 9 27 81 243 491 729 1473 2187 4419 6561 13257 19683 39771 59049 119313 357939 1073817 3221451 9664353 28993059