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28850382 = 23211145709
BaseRepresentation
bin110111000001…
…1100011001110
32000021202021200
41232003203032
524341203012
62510210330
7500136621
oct156034316
960252250
1028850382
11153157a0
1297b39a6
135c91942
143b8ddb8
1527ed3dc
hex1b838ce

28850382 has 24 divisors (see below), whose sum is σ = 68192280. Its totient is φ = 8742480.

The previous prime is 28850363. The next prime is 28850383. The reversal of 28850382 is 28305882.

It is a super-3 number, since 3×288503823 (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28850383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72657 + ... + 73052.

It is an arithmetic number, because the mean of its divisors is an integer number (2841345).

Almost surely, 228850382 is an apocalyptic number.

28850382 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28850382 is an abundant number, since it is smaller than the sum of its proper divisors (39341898).

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

28850382 is a wasteful number, since it uses less digits than its factorization.

28850382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145728 (or 145725 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 28850382 is about 5371.2551605747. The cubic root of 28850382 is about 306.7024105050.

The spelling of 28850382 in words is "twenty-eight million, eight hundred fifty thousand, three hundred eighty-two".

Divisors: 1 2 3 6 9 11 18 22 33 66 99 198 145709 291418 437127 874254 1311381 1602799 2622762 3205598 4808397 9616794 14425191 28850382