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10010009988 = 22321131815413
BaseRepresentation
bin10010101001010010…
…01010000110000100
3221211121121012020200
421110221022012010
5131000030304423
64333141130500
7503025452406
oct112451120604
927747535220
1010010009988
114277431730
121b343b9a30
13c36ab3744
146ad60ab76
153d8bd8d43
hex254a4a184

10010009988 has 72 divisors (see below), whose sum is σ = 28493826816. Its totient is φ = 2935483200.

The previous prime is 10010009987. The next prime is 10010010013. The reversal of 10010009988 is 88990001001.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (10010009981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 395431 + ... + 419982.

Almost surely, 210010009988 is an apocalyptic number.

10010009988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

10010009988 is an abundant number, since it is smaller than the sum of its proper divisors (18483816828).

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

10010009988 is a wasteful number, since it uses less digits than its factorization.

10010009988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815465 (or 815460 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The spelling of 10010009988 in words is "ten billion, ten million, nine thousand, nine hundred eighty-eight".

Divisors: 1 2 3 4 6 9 11 12 18 22 31 33 36 44 62 66 93 99 124 132 186 198 279 341 372 396 558 682 1023 1116 1364 2046 3069 4092 6138 12276 815413 1630826 2446239 3261652 4892478 7338717 8969543 9784956 14677434 17939086 25277803 26908629 29354868 35878172 50555606 53817258 75833409 80725887 101111212 107634516 151666818 161451774 227500227 278055833 303333636 322903548 455000454 556111666 834167499 910000908 1112223332 1668334998 2502502497 3336669996 5005004994 10010009988