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680031472 = 24158326849
BaseRepresentation
bin101000100010000…
…111010011110000
31202101121011210211
4220202013103300
52343042001342
6151251233504
722565113021
oct5042072360
91671534724
10680031472
1131995078a
1216b8a8894
13aab6a3b3
146645ac48
153ea7ac17
hex288874f0

680031472 has 20 divisors (see below), whose sum is σ = 1318442400. Its totient is φ = 339788288.

The previous prime is 680031449. The next prime is 680031479. The reversal of 680031472 is 274130086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680031479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11904 + ... + 38752.

It is an arithmetic number, because the mean of its divisors is an integer number (65922120).

Almost surely, 2680031472 is an apocalyptic number.

It is an amenable number.

680031472 is a deficient number, since it is larger than the sum of its proper divisors (638410928).

680031472 is a wasteful number, since it uses less digits than its factorization.

680031472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28440 (or 28434 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 680031472 is about 26077.4130618817. The cubic root of 680031472 is about 879.3795005972.

The spelling of 680031472 in words is "six hundred eighty million, thirty-one thousand, four hundred seventy-two".

Divisors: 1 2 4 8 16 1583 3166 6332 12664 25328 26849 53698 107396 214792 429584 42501967 85003934 170007868 340015736 680031472