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7688480868 = 22321391536467
BaseRepresentation
bin1110010100100010…
…01110100001100100
3201211211020021222200
413022101032201210
5111221222341433
63310530454500
7361346003055
oct71221164144
921754207880
107688480868
113295a46522
1215a6a34430
13956b41183
1452d17672c
152eeeb3613
hex1ca44e864

7688480868 has 36 divisors (see below), whose sum is σ = 19574602320. Its totient is φ = 2544387696.

The previous prime is 7688480867. The next prime is 7688480923. The reversal of 7688480868 is 8680848867.

7688480868 is a `hidden beast` number, since 76 + 8 + 8 + 480 + 86 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×76884808682 (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7688480867) 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, 763230 + ... + 773237.

Almost surely, 27688480868 is an apocalyptic number.

It is an amenable number.

7688480868 is an abundant number, since it is smaller than the sum of its proper divisors (11886121452).

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

7688480868 is a wasteful number, since it uses less digits than its factorization.

7688480868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536616 (or 1536611 counting only the distinct ones).

The product of its (nonzero) digits is 33030144, while the sum is 63.

The square root of 7688480868 is about 87683.9829615421. The cubic root of 7688480868 is about 1973.6956290784.

The spelling of 7688480868 in words is "seven billion, six hundred eighty-eight million, four hundred eighty thousand, eight hundred sixty-eight".

Divisors: 1 2 3 4 6 9 12 18 36 139 278 417 556 834 1251 1668 2502 5004 1536467 3072934 4609401 6145868 9218802 13828203 18437604 27656406 55312812 213568913 427137826 640706739 854275652 1281413478 1922120217 2562826956 3844240434 7688480868