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87740223 = 3253911519
BaseRepresentation
bin1010011101011…
…00111100111111
320010002122221220
411032230330333
5134430141343
612412324423
72113531254
oct516547477
9203078856
1087740223
114558858a
1225473713
13152404bc
14b91d42b
157a82183
hex53acf3f

87740223 has 8 divisors (see below), whose sum is σ = 117043200. Its totient is φ = 58465368.

The previous prime is 87740221. The next prime is 87740249. The reversal of 87740223 is 32204778.

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

It is not a de Polignac number, because 87740223 - 21 = 87740221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87740221) 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, 1858 + ... + 13376.

It is an arithmetic number, because the mean of its divisors is an integer number (14630400).

Almost surely, 287740223 is an apocalyptic number.

87740223 is a deficient number, since it is larger than the sum of its proper divisors (29302977).

87740223 is a wasteful number, since it uses less digits than its factorization.

87740223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14061.

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 87740223 is about 9366.9751254073. The cubic root of 87740223 is about 444.3579057598.

The spelling of 87740223 in words is "eighty-seven million, seven hundred forty thousand, two hundred twenty-three".

Divisors: 1 3 2539 7617 11519 34557 29246741 87740223