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212870 = 2573041
BaseRepresentation
bin110011111110000110
3101211000002
4303332012
523302440
64321302
71544420
oct637606
9354002
10212870
11135a29
12a3232
1375b78
1457810
1543115
hex33f86

212870 has 16 divisors (see below), whose sum is σ = 438048. Its totient is φ = 72960.

The previous prime is 212869. The next prime is 212873. The reversal of 212870 is 78212.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 212870.

It is not an unprimeable number, because it can be changed into a prime (212873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1451 + ... + 1590.

It is an arithmetic number, because the mean of its divisors is an integer number (27378).

2212870 is an apocalyptic number.

212870 is an abundant number, since it is smaller than the sum of its proper divisors (225178).

It is a weird number, because it is abundant, but not a pseudoperfect number.

212870 is a wasteful number, since it uses less digits than its factorization.

212870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3055.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 212870 is about 461.3783696707. The cubic root of 212870 is about 59.7087739284.

The spelling of 212870 in words is "two hundred twelve thousand, eight hundred seventy".

Divisors: 1 2 5 7 10 14 35 70 3041 6082 15205 21287 30410 42574 106435 212870