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28075320 = 23325713857
BaseRepresentation
bin110101100011…
…0010100111000
31221211101002200
41223012110320
524141402240
62441430200
7460431150
oct153062470
957741080
1028075320
1114936449
12949b360
135a7cc20
143a2b760
1526e8930
hex1ac6538

28075320 has 192 divisors, whose sum is σ = 112432320. Its totient is φ = 5916672.

The previous prime is 28075303. The next prime is 28075321. The reversal of 28075320 is 2357082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28075321) 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, 32332 + ... + 33188.

It is an arithmetic number, because the mean of its divisors is an integer number (585585).

Almost surely, 228075320 is an apocalyptic number.

28075320 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 28075320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56216160).

28075320 is an abundant number, since it is smaller than the sum of its proper divisors (84357000).

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

28075320 is a wasteful number, since it uses less digits than its factorization.

28075320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894 (or 887 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 28075320 is about 5298.6149133524. The cubic root of 28075320 is about 303.9309342178.

The spelling of 28075320 in words is "twenty-eight million, seventy-five thousand, three hundred twenty".