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9999940 = 2252321739
BaseRepresentation
bin100110001001…
…011001000100
3200211001100011
4212021121010
510024444230
6554200004
7150666226
oct46113104
920731304
109999940
115710115
123423004
1320c1832
141484416
15d27e2a
hex989644

9999940 has 24 divisors (see below), whose sum is σ = 21913920. Its totient is φ = 3825888.

The previous prime is 9999937. The next prime is 9999943. The reversal of 9999940 is 499999.

It is an interprime number because it is at equal distance from previous prime (9999937) and next prime (9999943).

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9999943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10410 + ... + 11329.

It is an arithmetic number, because the mean of its divisors is an integer number (913080).

Almost surely, 29999940 is an apocalyptic number.

It is an amenable number.

9999940 is an abundant number, since it is smaller than the sum of its proper divisors (11913980).

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

9999940 is a wasteful number, since it uses less digits than its factorization.

9999940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21771 (or 21769 counting only the distinct ones).

The product of its (nonzero) digits is 236196, while the sum is 49.

The square root of 9999940 is about 3162.2681733212. The cubic root of 9999940 is about 215.4430381154.

The spelling of 9999940 in words is "nine million, nine hundred ninety-nine thousand, nine hundred forty".

Divisors: 1 2 4 5 10 20 23 46 92 115 230 460 21739 43478 86956 108695 217390 434780 499997 999994 1999988 2499985 4999970 9999940