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16909638 = 2310726339
BaseRepresentation
bin100000010000…
…0010101000110
31011211002122220
41000200111012
513312102023
61402233210
7263505144
oct100402506
934732586
1016909638
1195aa509
1257b5806
133670905
142362594
1517403e3
hex1020546

16909638 has 16 divisors (see below), whose sum is σ = 34136640. Its totient is φ = 5583656.

The previous prime is 16909631. The next prime is 16909643. The reversal of 16909638 is 83690961.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 16909638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16909631) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 12528 + ... + 13811.

It is an arithmetic number, because the mean of its divisors is an integer number (2133540).

Almost surely, 216909638 is an apocalyptic number.

16909638 is an abundant number, since it is smaller than the sum of its proper divisors (17227002).

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

16909638 is a wasteful number, since it uses less digits than its factorization.

16909638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26451.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 16909638 is about 4112.1330231402. The cubic root of 16909638 is about 256.6717687935.

The spelling of 16909638 in words is "sixteen million, nine hundred nine thousand, six hundred thirty-eight".

Divisors: 1 2 3 6 107 214 321 642 26339 52678 79017 158034 2818273 5636546 8454819 16909638