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2690980 = 225157857
BaseRepresentation
bin1010010000111110100100
312001201022221
422100332210
51142102410
6133402124
731605265
oct12207644
95051287
102690980
111578856
12a99344
13732ac6
1450096c
153824da
hex290fa4

2690980 has 24 divisors (see below), whose sum is σ = 5693688. Its totient is φ = 1068288.

The previous prime is 2690959. The next prime is 2690993. The reversal of 2690980 is 890962.

It can be written as a sum of positive squares in 4 ways, for example, as 553536 + 2137444 = 744^2 + 1462^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2712 + ... + 3568.

It is an arithmetic number, because the mean of its divisors is an integer number (237237).

22690980 is an apocalyptic number.

2690980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2690980 is an abundant number, since it is smaller than the sum of its proper divisors (3002708).

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

2690980 is a wasteful number, since it uses less digits than its factorization.

2690980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023 (or 1021 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 2690980 is about 1640.4206777531. The cubic root of 2690980 is about 139.0924285624.

The spelling of 2690980 in words is "two million, six hundred ninety thousand, nine hundred eighty".

Divisors: 1 2 4 5 10 20 157 314 628 785 857 1570 1714 3140 3428 4285 8570 17140 134549 269098 538196 672745 1345490 2690980