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29078031 = 3311911637
BaseRepresentation
bin110111011101…
…1001000001111
32000201022120010
41232323020033
524420444111
62515124303
7502105413
oct156731017
960638503
1029078031
1115460834
1298a3693
136041448
143c0cd43
152845aa6
hex1bbb20f

29078031 has 16 divisors (see below), whose sum is σ = 40255488. Its totient is φ = 18650400.

The previous prime is 29078011. The next prime is 29078057. The reversal of 29078031 is 13087092.

It is a happy number.

It is not a de Polignac number, because 29078031 - 27 = 29077903 is a prime.

It is a super-2 number, since 2×290780312 = 1691063773673922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 29078031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29078011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16945 + ... + 18581.

It is an arithmetic number, because the mean of its divisors is an integer number (2515968).

Almost surely, 229078031 is an apocalyptic number.

29078031 is a deficient number, since it is larger than the sum of its proper divisors (11177457).

29078031 is a wasteful number, since it uses less digits than its factorization.

29078031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 29078031 is about 5392.4049365751. The cubic root of 29078031 is about 307.5069943548.

The spelling of 29078031 in words is "twenty-nine million, seventy-eight thousand, thirty-one".

Divisors: 1 3 31 93 191 573 1637 4911 5921 17763 50747 152241 312667 938001 9692677 29078031