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99870042 = 23192633331
BaseRepresentation
bin1011111001111…
…10010101011010
320221220220221110
411330332111122
5201031320132
613524321150
72321611206
oct574762532
9227826843
1099870042
1151412928
12295431b6
13178c95cc
14d399b06
158b7b1cc
hex5f3e55a

99870042 has 32 divisors (see below), whose sum is σ = 211115520. Its totient is φ = 31408560.

The previous prime is 99870031. The next prime is 99870047. The reversal of 99870042 is 24007899.

It is not an unprimeable number, because it can be changed into a prime (99870047) 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 15 ways as a sum of consecutive naturals, for example, 28317 + ... + 31647.

It is an arithmetic number, because the mean of its divisors is an integer number (6597360).

Almost surely, 299870042 is an apocalyptic number.

It is a pronic number, being equal to 9993×9994.

99870042 is an abundant number, since it is smaller than the sum of its proper divisors (111245478).

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

99870042 is a wasteful number, since it uses less digits than its factorization.

99870042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3618.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 99870042 is about 9993.4999874919. The cubic root of 99870042 is about 463.9577256620.

The spelling of 99870042 in words is "ninety-nine million, eight hundred seventy thousand, forty-two".

Divisors: 1 2 3 6 19 38 57 114 263 526 789 1578 3331 4997 6662 9993 9994 14991 19986 29982 63289 126578 189867 379734 876053 1752106 2628159 5256318 16645007 33290014 49935021 99870042