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2801681380 = 225672090807
BaseRepresentation
bin1010011011111110…
…0100001111100100
321020020212011100001
42212333210033210
521214212301010
61142001431044
7126266620201
oct24677441744
97206764301
102801681380
111208526763
1266233b484
13358598644
141c8140ca8
15115e6cc3a
hexa6fe43e4

2801681380 has 24 divisors (see below), whose sum is σ = 5971347648. Its totient is φ = 1103945568.

The previous prime is 2801681369. The next prime is 2801681417. The reversal of 2801681380 is 831861082.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1044064 + ... + 1046743.

It is an arithmetic number, because the mean of its divisors is an integer number (248806152).

Almost surely, 22801681380 is an apocalyptic number.

2801681380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2801681380 is an abundant number, since it is smaller than the sum of its proper divisors (3169666268).

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

2801681380 is a wasteful number, since it uses less digits than its factorization.

2801681380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090883 (or 2090881 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 2801681380 is about 52930.9113845586. The cubic root of 2801681380 is about 1409.7418134641.

The spelling of 2801681380 in words is "two billion, eight hundred one million, six hundred eighty-one thousand, three hundred eighty".

Divisors: 1 2 4 5 10 20 67 134 268 335 670 1340 2090807 4181614 8363228 10454035 20908070 41816140 140084069 280168138 560336276 700420345 1400840690 2801681380