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7980680 = 2351271571
BaseRepresentation
bin11110011100011010001000
3120000110102202
4132130122020
54020340210
6443015332
7124556201
oct36343210
916013382
107980680
114561004
12280a548
1318656c6
1410ba5a8
15a799a5
hex79c688

7980680 has 32 divisors (see below), whose sum is σ = 18109440. Its totient is φ = 3165120.

The previous prime is 7980677. The next prime is 7980683. The reversal of 7980680 is 860897.

It is an interprime number because it is at equal distance from previous prime (7980677) and next prime (7980683).

It is not an unprimeable number, because it can be changed into a prime (7980683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4295 + ... + 5865.

It is an arithmetic number, because the mean of its divisors is an integer number (565920).

Almost surely, 27980680 is an apocalyptic number.

It is an amenable number.

7980680 is an abundant number, since it is smaller than the sum of its proper divisors (10128760).

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

7980680 is a wasteful number, since it uses less digits than its factorization.

7980680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709 (or 1705 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 7980680 is about 2825.0097344965. The cubic root of 7980680 is about 199.8388702208.

The spelling of 7980680 in words is "seven million, nine hundred eighty thousand, six hundred eighty".

Divisors: 1 2 4 5 8 10 20 40 127 254 508 635 1016 1270 1571 2540 3142 5080 6284 7855 12568 15710 31420 62840 199517 399034 798068 997585 1596136 1995170 3990340 7980680