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989898989898990 = 23532996632996633
BaseRepresentation
bin1110000100010011101101000…
…1101010000000110011101110
311210210221102022121121020200110
43201010323101222000303232
52014222001112403231430
613425201152405240450
7415335561530045613
oct34104732152006356
94723842277536613
10989898989898990
112674598932036a6
1293035080a03126
13336470c7056a12
141366351c50a50a
1579698276447b0
hex3844ed1a80cee

989898989898990 has 16 divisors (see below), whose sum is σ = 2375757575757648. Its totient is φ = 263973063973056.

The previous prime is 989898989898977. The next prime is 989898989899031. The reversal of 989898989898990 is 99898989898989.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16498316498287 + ... + 16498316498346.

It is an arithmetic number, because the mean of its divisors is an integer number (148484848484853).

Almost surely, 2989898989898990 is an apocalyptic number.

989898989898990 is an abundant number, since it is smaller than the sum of its proper divisors (1385858585858658).

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

989898989898990 is a wasteful number, since it uses less digits than its factorization.

989898989898990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32996632996643.

The product of its (nonzero) digits is 11284439629824, while the sum is 120.

The spelling of 989898989898990 in words is "nine hundred eighty-nine trillion, eight hundred ninety-eight billion, nine hundred eighty-nine million, eight hundred ninety-eight thousand, nine hundred ninety".

Divisors: 1 2 3 5 6 10 15 30 32996632996633 65993265993266 98989898989899 164983164983165 197979797979798 329966329966330 494949494949495 989898989898990