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28193400 = 23335223227
BaseRepresentation
bin110101110001…
…1001001111000
31222001101002000
41223203021320
524204142100
62444141000
7461432334
oct153431170
958041060
1028193400
1114a07134
129537760
135ac18b1
143a5c7c4
15271d900
hex1ae3278

28193400 has 192 divisors, whose sum is σ = 101779200. Its totient is φ = 7159680.

The previous prime is 28193383. The next prime is 28193411. The reversal of 28193400 is 439182.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 124087 + ... + 124313.

It is an arithmetic number, because the mean of its divisors is an integer number (530100).

Almost surely, 228193400 is an apocalyptic number.

28193400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28193400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50889600).

28193400 is an abundant number, since it is smaller than the sum of its proper divisors (73585800).

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

28193400 is a wasteful number, since it uses less digits than its factorization.

28193400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 28193400 is about 5309.7457566253. The cubic root of 28193400 is about 304.3564321139.

The spelling of 28193400 in words is "twenty-eight million, one hundred ninety-three thousand, four hundred".