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2812813780 = 2257127158201
BaseRepresentation
bin1010011110101000…
…0010000111010100
321021000210202010011
42213222002013110
521230040020110
61143040210004
7126463344160
oct24752020724
97230722104
102812813780
11121383a697
12666009904
1335a99576a
141c97dbca0
15116e1b48a
hexa7a821d4

2812813780 has 48 divisors (see below), whose sum is σ = 6803951616. Its totient is φ = 956793600.

The previous prime is 2812813777. The next prime is 2812813793. The reversal of 2812813780 is 873182182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61321 + ... + 96880.

It is an arithmetic number, because the mean of its divisors is an integer number (141748992).

Almost surely, 22812813780 is an apocalyptic number.

2812813780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2812813780 is an abundant number, since it is smaller than the sum of its proper divisors (3991137836).

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

2812813780 is a wasteful number, since it uses less digits than its factorization.

2812813780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158344 (or 158342 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 2812813780 is about 53035.9668526935. The cubic root of 2812813780 is about 1411.6065352868.

The spelling of 2812813780 in words is "two billion, eight hundred twelve million, eight hundred thirteen thousand, seven hundred eighty".

Divisors: 1 2 4 5 7 10 14 20 28 35 70 127 140 254 508 635 889 1270 1778 2540 3556 4445 8890 17780 158201 316402 632804 791005 1107407 1582010 2214814 3164020 4429628 5537035 11074070 20091527 22148140 40183054 80366108 100457635 140640689 200915270 281281378 401830540 562562756 703203445 1406406890 2812813780