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99981642 = 2316663607
BaseRepresentation
bin1011111010110…
…01100101001010
320222010121000210
411331121211022
5201043403032
613530541550
72322554445
oct575314512
9228117023
1099981642
1151489762
12295978b6
1317938347
14d3c865c
158b9e2cc
hex5f5994a

99981642 has 8 divisors (see below), whose sum is σ = 199963296. Its totient is φ = 33327212.

The previous prime is 99981631. The next prime is 99981649. The reversal of 99981642 is 24618999.

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

99981642 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 99981591 and 99981600.

It is not an unprimeable number, because it can be changed into a prime (99981649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8331798 + ... + 8331809.

It is an arithmetic number, because the mean of its divisors is an integer number (24995412).

Almost surely, 299981642 is an apocalyptic number.

99981642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

99981642 is a wasteful number, since it uses less digits than its factorization.

99981642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16663612.

The product of its digits is 279936, while the sum is 48.

The square root of 99981642 is about 9999.0820578691. The cubic root of 99981642 is about 464.1304781937.

The spelling of 99981642 in words is "ninety-nine million, nine hundred eighty-one thousand, six hundred forty-two".

Divisors: 1 2 3 6 16663607 33327214 49990821 99981642