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1378191376 = 2492812
BaseRepresentation
bin101001000100101…
…1000100000010000
310120001022101011001
41102021120200100
510310304111001
6344431231344
746103301442
oct12211304020
93501271131
101378191376
11647a53641
12325678554
1318c6b4073
14d1076492
1580ed8001
hex52258810

1378191376 has 15 divisors (see below), whose sum is σ = 2670533533. Its totient is φ = 689021440.

The previous prime is 1378191371. The next prime is 1378191379. The reversal of 1378191376 is 6731918731.

The square root of 1378191376 is 37124.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1230325776 + 147865600 = 35076^2 + 12160^2 .

It is a super-2 number, since 2×13781913762 = 3798822937761546752, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1378191371) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 143856 + ... + 153136.

Almost surely, 21378191376 is an apocalyptic number.

1378191376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1378191376 is the 37124-th square number.

It is an amenable number.

1378191376 is a deficient number, since it is larger than the sum of its proper divisors (1292342157).

1378191376 is an frugal number, since it uses more digits than its factorization.

1378191376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18570 (or 9283 counting only the distinct ones).

The product of its digits is 190512, while the sum is 46.

The cubic root of 1378191376 is about 1112.8496904496.

The spelling of 1378191376 in words is "one billion, three hundred seventy-eight million, one hundred ninety-one thousand, three hundred seventy-six".

Divisors: 1 2 4 8 16 9281 18562 37124 74248 148496 86136961 172273922 344547844 689095688 1378191376