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12880070 = 257374973
BaseRepresentation
bin110001001000…
…100011000110
3220020101010122
4301020203012
511244130240
61140021542
7214323140
oct61104306
926211118
1012880070
1172a7a95
1243918b2
13288c758
1419d3c90
1511e64b5
hexc488c6

12880070 has 32 divisors (see below), whose sum is σ = 27217728. Its totient is φ = 4295808.

The previous prime is 12880061. The next prime is 12880093. The reversal of 12880070 is 7008821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104 + ... + 5076.

It is an arithmetic number, because the mean of its divisors is an integer number (850554).

Almost surely, 212880070 is an apocalyptic number.

12880070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12880070 is an abundant number, since it is smaller than the sum of its proper divisors (14337658).

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

12880070 is a wasteful number, since it uses less digits than its factorization.

12880070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5024.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 12880070 is about 3588.8814413407. The cubic root of 12880070 is about 234.4081682244.

Adding to 12880070 its reverse (7008821), we get a palindrome (19888891).

The spelling of 12880070 in words is "twelve million, eight hundred eighty thousand, seventy".

Divisors: 1 2 5 7 10 14 35 37 70 74 185 259 370 518 1295 2590 4973 9946 24865 34811 49730 69622 174055 184001 348110 368002 920005 1288007 1840010 2576014 6440035 12880070