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28688413430154 = 2391123431223999
BaseRepresentation
bin1101000010111100010101…
…01100010001000110001010
310202120120210212011120110110
412201132022230101012022
512230012332314231104
6141003135235055150
76020445425446512
oct641361254210612
9122516725146413
1028688413430154
119160762526505
12327400b7414b6
1313013c8a4482a
14712753082842
1534b3b8a9ae89
hex1a178ab1118a

28688413430154 has 32 divisors (see below), whose sum is σ = 57442516992000. Its totient is φ = 9551857114800.

The previous prime is 28688413430147. The next prime is 28688413430203. The reversal of 28688413430154 is 45103431488682.

It is a junction number, because it is equal to n+sod(n) for n = 28688413430094 and 28688413430103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127961847 + ... + 128185845.

It is an arithmetic number, because the mean of its divisors is an integer number (1795078656000).

Almost surely, 228688413430154 is an apocalyptic number.

28688413430154 is an abundant number, since it is smaller than the sum of its proper divisors (28754103561846).

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

28688413430154 is a wasteful number, since it uses less digits than its factorization.

28688413430154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248346.

The product of its (nonzero) digits is 17694720, while the sum is 57.

The spelling of 28688413430154 in words is "twenty-eight trillion, six hundred eighty-eight billion, four hundred thirteen million, four hundred thirty thousand, one hundred fifty-four".

Divisors: 1 2 3 6 911 1822 2733 5466 23431 46862 70293 140586 223999 447998 671997 1343994 21345641 42691282 64036923 128073846 204063089 408126178 612189267 1224378534 5248520569 10497041138 15745561707 31491123414 4781402238359 9562804476718 14344206715077 28688413430154