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19394490 = 235679649
BaseRepresentation
bin100100111111…
…0111110111010
31100111100020110
41021332332322
514431110430
61531405150
7323564463
oct111767672
940440213
1019394490
11aa47405
1265b37b6
13403093b
14280bd6a
151a817b0
hex127efba

19394490 has 32 divisors (see below), whose sum is σ = 47246400. Its totient is φ = 5094144.

The previous prime is 19394489. The next prime is 19394509. The reversal of 19394490 is 9449391.

It is a super-2 number, since 2×193944902 = 752292484720200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2815 + ... + 6834.

It is an arithmetic number, because the mean of its divisors is an integer number (1476450).

Almost surely, 219394490 is an apocalyptic number.

19394490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19394490 is an abundant number, since it is smaller than the sum of its proper divisors (27851910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19394490 is a wasteful number, since it uses less digits than its factorization.

19394490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9726.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 19394490 is about 4403.9175741605. The cubic root of 19394490 is about 268.6742970479.

The spelling of 19394490 in words is "nineteen million, three hundred ninety-four thousand, four hundred ninety".

Divisors: 1 2 3 5 6 10 15 30 67 134 201 335 402 670 1005 2010 9649 19298 28947 48245 57894 96490 144735 289470 646483 1292966 1939449 3232415 3878898 6464830 9697245 19394490