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2138472 = 233274243
BaseRepresentation
bin1000001010000101101000
311000122102200
420022011220
51021412342
6113500200
724114420
oct10120550
94018380
102138472
111230736
12871660
1359b48b
143d9480
152c394c
hex20a168

2138472 has 48 divisors (see below), whose sum is σ = 6620640. Its totient is φ = 610848.

The previous prime is 2138467. The next prime is 2138483. The reversal of 2138472 is 2748312.

It is a nude number because it is divisible by every one of its digits.

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 11 ways as a sum of consecutive naturals, for example, 1618 + ... + 2625.

It is an arithmetic number, because the mean of its divisors is an integer number (137930).

22138472 is an apocalyptic number.

It is an amenable number.

2138472 is an abundant number, since it is smaller than the sum of its proper divisors (4482168).

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

2138472 is a wasteful number, since it uses less digits than its factorization.

2138472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4262 (or 4255 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 2138472 is about 1462.3515309254. The cubic root of 2138472 is about 128.8351960705.

The spelling of 2138472 in words is "two million, one hundred thirty-eight thousand, four hundred seventy-two".

Divisors: 1 2 3 4 6 7 8 9 12 14 18 21 24 28 36 42 56 63 72 84 126 168 252 504 4243 8486 12729 16972 25458 29701 33944 38187 50916 59402 76374 89103 101832 118804 152748 178206 237608 267309 305496 356412 534618 712824 1069236 2138472