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72348143 = 719543971
BaseRepresentation
bin1000100111111…
…11000111101111
312001010122222212
410103333013233
5122010120033
611102401035
71535643350
oct423770757
9161118885
1072348143
113792525a
122029017b
1311cb156a
149873d27
156541748
hex44ff1ef

72348143 has 8 divisors (see below), whose sum is σ = 87035520. Its totient is φ = 58748760.

The previous prime is 72348109. The next prime is 72348151. The reversal of 72348143 is 34184327.

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

It is not a de Polignac number, because 72348143 - 212 = 72344047 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 (72348103) 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, 271853 + ... + 272118.

It is an arithmetic number, because the mean of its divisors is an integer number (10879440).

Almost surely, 272348143 is an apocalyptic number.

72348143 is a deficient number, since it is larger than the sum of its proper divisors (14687377).

72348143 is a wasteful number, since it uses less digits than its factorization.

72348143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543997.

The product of its digits is 16128, while the sum is 32.

The square root of 72348143 is about 8505.7711584547. The cubic root of 72348143 is about 416.6862114210.

The spelling of 72348143 in words is "seventy-two million, three hundred forty-eight thousand, one hundred forty-three".

Divisors: 1 7 19 133 543971 3807797 10335449 72348143