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6989960 = 235174749
BaseRepresentation
bin11010101010100010001000
3111011010102102
4122222202020
53242134320
6405452532
7113261615
oct32524210
914133372
106989960
113a4472a
122411148
1315a9793
14cdd50c
15931175
hex6aa888

6989960 has 16 divisors (see below), whose sum is σ = 15727500. Its totient is φ = 2795968.

The previous prime is 6989959. The next prime is 6989963. The reversal of 6989960 is 699896.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6340324 + 649636 = 2518^2 + 806^2 .

It is not an unprimeable number, because it can be changed into a prime (6989963) 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, 87335 + ... + 87414.

Almost surely, 26989960 is an apocalyptic number.

It is an amenable number.

6989960 is an abundant number, since it is smaller than the sum of its proper divisors (8737540).

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

6989960 is a wasteful number, since it uses less digits than its factorization.

6989960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174760 (or 174756 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 6989960 is about 2643.8532485749. The cubic root of 6989960 is about 191.2016181886.

Subtracting from 6989960 its reverse (699896), we obtain a square (6290064 = 25082).

The spelling of 6989960 in words is "six million, nine hundred eighty-nine thousand, nine hundred sixty".

Divisors: 1 2 4 5 8 10 20 40 174749 349498 698996 873745 1397992 1747490 3494980 6989960