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2808025 = 521110211
BaseRepresentation
bin1010101101100011011001
312021122212221
422231203121
51204324100
6140104041
732603443
oct12554331
95248787
102808025
111648790
12b35021
1377416c
14531493
153a701a
hex2ad8d9

2808025 has 12 divisors (see below), whose sum is σ = 3798864. Its totient is φ = 2042000.

The previous prime is 2808023. The next prime is 2808031. The reversal of 2808025 is 5208082.

It is not a de Polignac number, because 2808025 - 21 = 2808023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2808023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4831 + ... + 5380.

It is an arithmetic number, because the mean of its divisors is an integer number (316572).

22808025 is an apocalyptic number.

2808025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2808025 is a deficient number, since it is larger than the sum of its proper divisors (990839).

2808025 is a wasteful number, since it uses less digits than its factorization.

2808025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10232 (or 10227 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 2808025 is about 1675.7162647656. The cubic root of 2808025 is about 141.0804999470.

The spelling of 2808025 in words is "two million, eight hundred eight thousand, twenty-five".

Divisors: 1 5 11 25 55 275 10211 51055 112321 255275 561605 2808025