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99840442 = 2133840017
BaseRepresentation
bin1011111001101…
…11000110111010
320221212102100011
411330313012322
5201024343232
613523532134
72321426002
oct574670672
9227772304
1099840442
11513a2669
122952a04a
13178b8cb0
14d38d002
158b72547
hex5f371ba

99840442 has 8 divisors (see below), whose sum is σ = 161280756. Its totient is φ = 46080192.

The previous prime is 99840409. The next prime is 99840443. The reversal of 99840442 is 24404899.

It can be written as a sum of positive squares in 2 ways, for example, as 82791801 + 17048641 = 9099^2 + 4129^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×998404423 (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 99840395 and 99840404.

It is not an unprimeable number, because it can be changed into a prime (99840443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1919983 + ... + 1920034.

Almost surely, 299840442 is an apocalyptic number.

99840442 is a deficient number, since it is larger than the sum of its proper divisors (61440314).

99840442 is a wasteful number, since it uses less digits than its factorization.

99840442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3840032.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 99840442 is about 9992.0189151142. The cubic root of 99840442 is about 463.9118844021.

The spelling of 99840442 in words is "ninety-nine million, eight hundred forty thousand, four hundred forty-two".

Divisors: 1 2 13 26 3840017 7680034 49920221 99840442