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28994375380608 = 2732112288066239
BaseRepresentation
bin1101001011110110001110…
…11100011110111010000000
310210122211112212120001201100
412211323013130132322000
512300020440044134413
6141355455425334400
76051526436225001
oct645730734367200
9123584485501640
1028994375380608
11926949a025390
123303379797400
131324208aa9371
14723499d2b1a8
15354324878a73
hex1a5ec771ee80

28994375380608 has 96 divisors (see below), whose sum is σ = 91019275027200. Its totient is φ = 8786174353920.

The previous prime is 28994375380601. The next prime is 28994375380681. The reversal of 28994375380608 is 80608357349982.

28994375380608 is a `hidden beast` number, since 2 + 8 + 9 + 9 + 4 + 3 + 7 + 5 + 3 + 8 + 0 + 608 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (28994375380601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1144020448 + ... + 1144045791.

It is an arithmetic number, because the mean of its divisors is an integer number (948117448200).

Almost surely, 228994375380608 is an apocalyptic number.

It is an amenable number.

28994375380608 is an abundant number, since it is smaller than the sum of its proper divisors (62024899646592).

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

28994375380608 is a wasteful number, since it uses less digits than its factorization.

28994375380608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288066270 (or 2288066255 counting only the distinct ones).

The product of its (nonzero) digits is 627056640, while the sum is 72.

The spelling of 28994375380608 in words is "twenty-eight trillion, nine hundred ninety-four billion, three hundred seventy-five million, three hundred eighty thousand, six hundred eight".