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1669995000 = 233254173759
BaseRepresentation
bin110001110001010…
…0001100111111000
311022101101112110200
41203202201213320
511410004320000
6433413442200
756245503042
oct14342414770
94271345420
101669995000
11787739a63
123a7340360
13207ca222b
1411bb14a92
159b928500
hex638a19f8

1669995000 has 480 divisors, whose sum is σ = 6250186800. Its totient is φ = 400896000.

The previous prime is 1669994959. The next prime is 1669995001. The reversal of 1669995000 is 5999661.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1669995001) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 28304971 + ... + 28305029.

Almost surely, 21669995000 is an apocalyptic number.

1669995000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1669995000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3125093400).

1669995000 is an abundant number, since it is smaller than the sum of its proper divisors (4580191800).

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

1669995000 is a wasteful number, since it uses less digits than its factorization.

1669995000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 1669995000 is about 40865.5723072613. The cubic root of 1669995000 is about 1186.4198118145.

The spelling of 1669995000 in words is "one billion, six hundred sixty-nine million, nine hundred ninety-five thousand".