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19028972 = 2238312421
BaseRepresentation
bin100100010010…
…1101111101100
31022210202211202
41020211233230
514332411342
61515505032
7320513024
oct110455754
938722752
1019028972
11a817826
126458178
133c33461
142754a84
151a0d332
hex1225bec

19028972 has 12 divisors (see below), whose sum is σ = 33390336. Its totient is φ = 9488880.

The previous prime is 19028969. The next prime is 19029007. The reversal of 19028972 is 27982091.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4679 + ... + 7742.

It is an arithmetic number, because the mean of its divisors is an integer number (2782528).

Almost surely, 219028972 is an apocalyptic number.

It is an amenable number.

19028972 is a deficient number, since it is larger than the sum of its proper divisors (14361364).

19028972 is a wasteful number, since it uses less digits than its factorization.

19028972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12808 (or 12806 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 19028972 is about 4362.2209939433. The cubic root of 19028972 is about 266.9757256988.

The spelling of 19028972 in words is "nineteen million, twenty-eight thousand, nine hundred seventy-two".

Divisors: 1 2 4 383 766 1532 12421 24842 49684 4757243 9514486 19028972