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144487877 = 1975691289
BaseRepresentation
bin10001001110010…
…11010111000101
3101001212202002212
420213023113011
5243442103002
622200513205
73403061312
oct1047132705
9331782085
10144487877
1174617976
124047b805
1323c1bcb1
1415291d09
15ca41352
hex89cb5c5

144487877 has 8 divisors (see below), whose sum is σ = 145589400. Its totient is φ = 143390464.

The previous prime is 144487853. The next prime is 144487883. The reversal of 144487877 is 778784441.

144487877 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 59737441 + 84750436 = 7729^2 + 9206^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 144487877 - 214 = 144471493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144487177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111449 + ... + 112737.

It is an arithmetic number, because the mean of its divisors is an integer number (18198675).

Almost surely, 2144487877 is an apocalyptic number.

It is an amenable number.

144487877 is a deficient number, since it is larger than the sum of its proper divisors (1101523).

144487877 is a wasteful number, since it uses less digits than its factorization.

144487877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2055.

The product of its digits is 1404928, while the sum is 50.

The square root of 144487877 is about 12020.3110192707. The cubic root of 144487877 is about 524.7395557775.

The spelling of 144487877 in words is "one hundred forty-four million, four hundred eighty-seven thousand, eight hundred seventy-seven".

Divisors: 1 197 569 1289 112093 253933 733441 144487877