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2878359980 = 225143917999
BaseRepresentation
bin1010101110010000…
…0100100110101100
321102121010211121012
42223210010212230
521343330004410
61153341124352
7131220441026
oct25344044654
97377124535
102878359980
111247839501
12683b596b8
1336b434cb2
141d43c1016
1511ca67605
hexab9049ac

2878359980 has 12 divisors (see below), whose sum is σ = 6044556000. Its totient is φ = 1151343984.

The previous prime is 2878359961. The next prime is 2878359983. The reversal of 2878359980 is 899538782.

It is a hoax number, since the sum of its digits (59) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2878359983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71958980 + ... + 71959019.

It is an arithmetic number, because the mean of its divisors is an integer number (503713000).

Almost surely, 22878359980 is an apocalyptic number.

2878359980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2878359980 is an abundant number, since it is smaller than the sum of its proper divisors (3166196020).

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

2878359980 is a wasteful number, since it uses less digits than its factorization.

2878359980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143918008 (or 143918006 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 59.

The square root of 2878359980 is about 53650.3492998881. The cubic root of 2878359980 is about 1422.4872068061.

The spelling of 2878359980 in words is "two billion, eight hundred seventy-eight million, three hundred fifty-nine thousand, nine hundred eighty".

Divisors: 1 2 4 5 10 20 143917999 287835998 575671996 719589995 1439179990 2878359980