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31681674 = 23212713859
BaseRepresentation
bin111100011011…
…0110010001010
32012121121002100
41320312302022
531102303144
63051014230
7533201253
oct170666212
965547070
1031681674
1116979a02
12a73a376
13674356b
1442c9b2a
152bac269
hex1e36c8a

31681674 has 24 divisors (see below), whose sum is σ = 69189120. Its totient is φ = 10476648.

The previous prime is 31681673. The next prime is 31681703. The reversal of 31681674 is 47618613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31681673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4644 + ... + 9215.

It is an arithmetic number, because the mean of its divisors is an integer number (2882880).

Almost surely, 231681674 is an apocalyptic number.

31681674 is an abundant number, since it is smaller than the sum of its proper divisors (37507446).

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

31681674 is a wasteful number, since it uses less digits than its factorization.

31681674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13994 (or 13991 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 31681674 is about 5628.6476173234. The cubic root of 31681674 is about 316.4239689190.

The spelling of 31681674 in words is "thirty-one million, six hundred eighty-one thousand, six hundred seventy-four".

Divisors: 1 2 3 6 9 18 127 254 381 762 1143 2286 13859 27718 41577 83154 124731 249462 1760093 3520186 5280279 10560558 15840837 31681674