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989898905 = 52943915551
BaseRepresentation
bin111011000000001…
…010100010011001
32112222200002000102
4323000022202121
54011403231110
6242120545145
733350000432
oct7300124231
92488602012
10989898905
11468854776
122376221b5
1312a1115c8
149567c489
155bd885a5
hex3b00a899

989898905 has 16 divisors (see below), whose sum is σ = 1231718400. Its totient is φ = 762820800.

The previous prime is 989898887. The next prime is 989898929. The reversal of 989898905 is 509898989.

It is not a de Polignac number, because 989898905 - 212 = 989894809 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55880 + ... + 71430.

It is an arithmetic number, because the mean of its divisors is an integer number (76982400).

Almost surely, 2989898905 is an apocalyptic number.

It is an amenable number.

989898905 is a deficient number, since it is larger than the sum of its proper divisors (241819495).

989898905 is a wasteful number, since it uses less digits than its factorization.

989898905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16024.

The product of its (nonzero) digits is 16796160, while the sum is 65.

The square root of 989898905 is about 31462.6588990823. The cubic root of 989898905 is about 996.6215673800.

The spelling of 989898905 in words is "nine hundred eighty-nine million, eight hundred ninety-eight thousand, nine hundred five".

Divisors: 1 5 29 145 439 2195 12731 15551 63655 77755 450979 2254895 6826889 34134445 197979781 989898905