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28304074890 = 23357134128097
BaseRepresentation
bin11010010111000011…
…011110100010001010
32201001120002222111000
4122113003132202022
5430431320344030
621000330315430
72021254444530
oct322703364212
981046088430
1028304074890
1111004a04433
12559ab88b76
132890c14510
141527104150
15b09ccc860
hex6970de88a

28304074890 has 256 divisors, whose sum is σ = 95164554240. Its totient is φ = 5825986560.

The previous prime is 28304074769. The next prime is 28304074901. The reversal of 28304074890 is 9847040382.

It is a super-2 number, since 2×283040748902 (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 993322 + ... + 1021418.

It is an arithmetic number, because the mean of its divisors is an integer number (371736540).

Almost surely, 228304074890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28304074890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47582277120).

28304074890 is an abundant number, since it is smaller than the sum of its proper divisors (66860479350).

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

28304074890 is a wasteful number, since it uses less digits than its factorization.

28304074890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28174 (or 28168 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 28304074890 in words is "twenty-eight billion, three hundred four million, seventy-four thousand, eight hundred ninety".