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6978098680 = 235771351011
BaseRepresentation
bin1100111111110110…
…10101010111111000
3200000022112010211021
412133323111113320
5103242343124210
63112232512224
7334631601010
oct63773252770
920008463737
106978098680
112a60a55903
121428b4b674
13872908297
144a2a98c40
152ac93ebda
hex19fed55f8

6978098680 has 64 divisors (see below), whose sum is σ = 18196462080. Its totient is φ = 2358787200.

The previous prime is 6978098663. The next prime is 6978098717. The reversal of 6978098680 is 868908796.

It is a super-2 number, since 2×69780986802 = 97387722375635484800, which contains 22 as substring.

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, 155626 + ... + 195385.

It is an arithmetic number, because the mean of its divisors is an integer number (284319720).

Almost surely, 26978098680 is an apocalyptic number.

It is an amenable number.

6978098680 is an abundant number, since it is smaller than the sum of its proper divisors (11218363400).

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

6978098680 is a wasteful number, since it uses less digits than its factorization.

6978098680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351100 (or 351096 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 61.

The square root of 6978098680 is about 83535.0146944382. The cubic root of 6978098680 is about 1910.9340642980.

The spelling of 6978098680 in words is "six billion, nine hundred seventy-eight million, ninety-eight thousand, six hundred eighty".

Divisors: 1 2 4 5 7 8 10 14 20 28 35 40 56 70 71 140 142 280 284 355 497 568 710 994 1420 1988 2485 2840 3976 4970 9940 19880 351011 702022 1404044 1755055 2457077 2808088 3510110 4914154 7020220 9828308 12285385 14040440 19656616 24570770 24921781 49141540 49843562 98283080 99687124 124608905 174452467 199374248 249217810 348904934 498435620 697809868 872262335 996871240 1395619736 1744524670 3489049340 6978098680