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989896143 = 31940934243
BaseRepresentation
bin111011000000001…
…001110111001111
32112222122221020010
4323000021313033
54011403134033
6242120524303
733346656405
oct7300116717
92488587203
10989896143
11468852695
12237620693
1312a110282
149567b475
155bd87863
hex3b009dcf

989896143 has 16 divisors (see below), whose sum is σ = 1389994880. Its totient is φ = 624897504.

The previous prime is 989896109. The next prime is 989896153. The reversal of 989896143 is 341698989.

It is not a de Polignac number, because 989896143 - 26 = 989896079 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989896153) 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, 231180 + ... + 235422.

It is an arithmetic number, because the mean of its divisors is an integer number (86874680).

Almost surely, 2989896143 is an apocalyptic number.

989896143 is a deficient number, since it is larger than the sum of its proper divisors (400098737).

989896143 is a wasteful number, since it uses less digits than its factorization.

989896143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8358.

The product of its digits is 3359232, while the sum is 57.

The square root of 989896143 is about 31462.6150057493. The cubic root of 989896143 is about 996.6206404599.

The spelling of 989896143 in words is "nine hundred eighty-nine million, eight hundred ninety-six thousand, one hundred forty-three".

Divisors: 1 3 19 57 4093 4243 12279 12729 77767 80617 233301 241851 17366599 52099797 329965381 989896143