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7989925120 = 28531201359
BaseRepresentation
bin1110111000011110…
…01001010100000000
3202121211110020202121
413130033021110000
5112330410100440
63400455454024
7401666146222
oct73417112400
922554406677
107989925120
113430117001
12166b987314
139a4426458
1455b204412
1531b6aa34a
hex1dc3c9500

7989925120 has 72 divisors (see below), whose sum is σ = 19755832320. Its totient is φ = 3092858880.

The previous prime is 7989925103. The next prime is 7989925243. The reversal of 7989925120 is 215299897.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61000 + ... + 140359.

It is an arithmetic number, because the mean of its divisors is an integer number (274386560).

Almost surely, 27989925120 is an apocalyptic number.

It is an amenable number.

7989925120 is an abundant number, since it is smaller than the sum of its proper divisors (11765907200).

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

7989925120 is a wasteful number, since it uses less digits than its factorization.

7989925120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201411 (or 201397 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 52.

The square root of 7989925120 is about 89386.3810655740. The cubic root of 7989925120 is about 1999.1600739782.

The spelling of 7989925120 in words is "seven billion, nine hundred eighty-nine million, nine hundred twenty-five thousand, one hundred twenty".

Divisors: 1 2 4 5 8 10 16 20 31 32 40 62 64 80 124 128 155 160 248 256 310 320 496 620 640 992 1240 1280 1984 2480 3968 4960 7936 9920 19840 39680 201359 402718 805436 1006795 1610872 2013590 3221744 4027180 6242129 6443488 8054360 12484258 12886976 16108720 24968516 25773952 31210645 32217440 49937032 51547904 62421290 64434880 99874064 124842580 128869760 199748128 249685160 257739520 399496256 499370320 798992512 998740640 1597985024 1997481280 3994962560 7989925120