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2028285 = 325747137
BaseRepresentation
bin111101111001011111101
310211001021200
413233023331
51004401120
6111250113
723145240
oct7571375
93731250
102028285
111165976
12819939
1356028c
143ab257
152a0e90
hex1ef2fd

2028285 has 48 divisors (see below), whose sum is σ = 4133376. Its totient is φ = 900864.

The previous prime is 2028281. The next prime is 2028293. The reversal of 2028285 is 5828202.

It is not a de Polignac number, because 2028285 - 22 = 2028281 is a prime.

It is a super-2 number, since 2×20282852 = 8227880082450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2028281) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14737 + ... + 14873.

It is an arithmetic number, because the mean of its divisors is an integer number (86112).

22028285 is an apocalyptic number.

It is an amenable number.

2028285 is an abundant number, since it is smaller than the sum of its proper divisors (2105091).

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

2028285 is a wasteful number, since it uses less digits than its factorization.

2028285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 2028285 is about 1424.1787106961. The cubic root of 2028285 is about 126.5832745962.

The spelling of 2028285 in words is "two million, twenty-eight thousand, two hundred eighty-five".

Divisors: 1 3 5 7 9 15 21 35 45 47 63 105 137 141 235 315 329 411 423 685 705 959 987 1233 1645 2055 2115 2877 2961 4795 4935 6165 6439 8631 14385 14805 19317 32195 43155 45073 57951 96585 135219 225365 289755 405657 676095 2028285