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213892 = 2277639
BaseRepresentation
bin110100001110000100
3101212101221
4310032010
523321032
64330124
71550410
oct641604
9355357
10213892
11136778
12a3944
1376483
1457d40
1543597
hex34384

213892 has 12 divisors (see below), whose sum is σ = 427840. Its totient is φ = 91656.

The previous prime is 213887. The next prime is 213901. The reversal of 213892 is 298312.

213892 is an admirable number.

It is a plaindrome in base 11.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3792 + ... + 3847.

2213892 is an apocalyptic number.

It is an amenable number.

213892 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

213892 is a wasteful number, since it uses less digits than its factorization.

213892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7650 (or 7648 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 213892 is about 462.4845943380. The cubic root of 213892 is about 59.8041763954.

It can be divided in two parts, 21389 and 2, that multiplied together give a triangular number (42778 = T292).

The spelling of 213892 in words is "two hundred thirteen thousand, eight hundred ninety-two".

Divisors: 1 2 4 7 14 28 7639 15278 30556 53473 106946 213892