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99921912 = 233193607
BaseRepresentation
bin1011111010010…
…10111111111000
320222000120002120
411331022333320
5201040000122
613525401240
72322215346
oct575127770
9228016076
1099921912
11514488a2
1229569220
13179170bc
14d3b0996
158b8b75c
hex5f4aff8

99921912 has 64 divisors (see below), whose sum is σ = 264115200. Its totient is φ = 31502304.

The previous prime is 99921911. The next prime is 99921919. The reversal of 99921912 is 21912999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99921911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164313 + ... + 164919.

It is an arithmetic number, because the mean of its divisors is an integer number (4126800).

Almost surely, 299921912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99921912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132057600).

99921912 is an abundant number, since it is smaller than the sum of its proper divisors (164193288).

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

99921912 is a wasteful number, since it uses less digits than its factorization.

99921912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673 (or 631 counting only the distinct ones).

The product of its digits is 26244, while the sum is 42.

The square root of 99921912 is about 9996.0948374853. The cubic root of 99921912 is about 464.0380344367.

The spelling of 99921912 in words is "ninety-nine million, nine hundred twenty-one thousand, nine hundred twelve".

Divisors: 1 2 3 4 6 8 12 19 24 38 57 76 114 152 228 361 456 607 722 1083 1214 1444 1821 2166 2428 2888 3642 4332 4856 6859 7284 8664 11533 13718 14568 20577 23066 27436 34599 41154 46132 54872 69198 82308 92264 138396 164616 219127 276792 438254 657381 876508 1314762 1753016 2629524 4163413 5259048 8326826 12490239 16653652 24980478 33307304 49960956 99921912