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144740 = 2257237
BaseRepresentation
bin100011010101100100
321100112202
4203111210
514112430
63034032
71141661
oct432544
9240482
10144740
1199822
126b918
1350b5b
143aa68
152cd45
hex23564

144740 has 12 divisors (see below), whose sum is σ = 303996. Its totient is φ = 57888.

The previous prime is 144737. The next prime is 144751. The reversal of 144740 is 47441.

It can be written as a sum of positive squares in 2 ways, for example, as 73984 + 70756 = 272^2 + 266^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 7237 = 144740 / (1 + 4 + 4 + 7 + 4 + 0).

It is a nialpdrome in base 11.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3599 + ... + 3638.

It is an arithmetic number, because the mean of its divisors is an integer number (25333).

2144740 is an apocalyptic number.

144740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144740 is an abundant number, since it is smaller than the sum of its proper divisors (159256).

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

144740 is a wasteful number, since it uses less digits than its factorization.

144740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7246 (or 7244 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 144740 is about 380.4471053905. The cubic root of 144740 is about 52.5044591828.

The spelling of 144740 in words is "one hundred forty-four thousand, seven hundred forty", and thus it is an iban number.

Divisors: 1 2 4 5 10 20 7237 14474 28948 36185 72370 144740