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1321838190 = 23451631899
BaseRepresentation
bin100111011001001…
…1010011001101110
310102010021100010000
41032302122121232
510201342310230
6335055325130
744520303441
oct11662323156
93363240100
101321838190
11619163662
1230a8207a6
13180b12c9a
14c77a7658
157b0a5b60
hex4ec9a66e

1321838190 has 40 divisors (see below), whose sum is σ = 3554278200. Its totient is φ = 352489968.

The previous prime is 1321838173. The next prime is 1321838201. The reversal of 1321838190 is 918381231.

It is a super-2 number, since 2×13218381902 = 3494512401084952200, which contains 22 as substring.

It is a congruent number.

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 19 ways as a sum of consecutive naturals, for example, 815140 + ... + 816759.

It is an arithmetic number, because the mean of its divisors is an integer number (88856955).

Almost surely, 21321838190 is an apocalyptic number.

1321838190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321838190 is an abundant number, since it is smaller than the sum of its proper divisors (2232440010).

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

1321838190 is a wasteful number, since it uses less digits than its factorization.

1321838190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631918 (or 1631909 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1321838190 is about 36357.0927055506. The cubic root of 1321838190 is about 1097.4702721109.

The spelling of 1321838190 in words is "one billion, three hundred twenty-one million, eight hundred thirty-eight thousand, one hundred ninety".

Divisors: 1 2 3 5 6 9 10 15 18 27 30 45 54 81 90 135 162 270 405 810 1631899 3263798 4895697 8159495 9791394 14687091 16318990 24478485 29374182 44061273 48956970 73435455 88122546 132183819 146870910 220306365 264367638 440612730 660919095 1321838190