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31400234 = 243365119
BaseRepresentation
bin111011111001…
…0000100101010
32012002022000122
41313302010222
531014301414
63041003242
7530616605
oct167620452
965068018
1031400234
11167a7508
12a623522
136675428
14425533c
152b53b8e
hex1df212a

31400234 has 8 divisors (see below), whose sum is σ = 48195840. Its totient is φ = 15334956.

The previous prime is 31400233. The next prime is 31400249. The reversal of 31400234 is 43200413.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31400231) 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 3 ways as a sum of consecutive naturals, for example, 182474 + ... + 182645.

It is an arithmetic number, because the mean of its divisors is an integer number (6024480).

Almost surely, 231400234 is an apocalyptic number.

31400234 is a deficient number, since it is larger than the sum of its proper divisors (16795606).

31400234 is a wasteful number, since it uses less digits than its factorization.

31400234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365164.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 31400234 is about 5603.5911699552. The cubic root of 31400234 is about 315.4842103706.

Adding to 31400234 its reverse (43200413), we get a palindrome (74600647).

The spelling of 31400234 in words is "thirty-one million, four hundred thousand, two hundred thirty-four".

Divisors: 1 2 43 86 365119 730238 15700117 31400234