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2129908 = 221148407
BaseRepresentation
bin1000000111111111110100
311000012200111
420013333310
51021124113
6113352404
724050434
oct10077764
94005614
102129908
111225260
12868704
13597601
143d62c4
152c113d
hex207ff4

2129908 has 12 divisors (see below), whose sum is σ = 4066272. Its totient is φ = 968120.

The previous prime is 2129903. The next prime is 2129951. The reversal of 2129908 is 8099212.

It is a self number, because there is not a number n which added to its sum of digits gives 2129908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129903) 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, 24160 + ... + 24247.

It is an arithmetic number, because the mean of its divisors is an integer number (338856).

22129908 is an apocalyptic number.

It is an amenable number.

2129908 is a deficient number, since it is larger than the sum of its proper divisors (1936364).

2129908 is a wasteful number, since it uses less digits than its factorization.

2129908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48422 (or 48420 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 2129908 is about 1459.4204329116. The cubic root of 2129908 is about 128.6629826442.

It can be divided in two parts, 21 and 29908, that added together give a square (29929 = 1732).

The spelling of 2129908 in words is "two million, one hundred twenty-nine thousand, nine hundred eight".

Divisors: 1 2 4 11 22 44 48407 96814 193628 532477 1064954 2129908