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72106863 = 3231045027
BaseRepresentation
bin1000100110001…
…00001101101111
312000200102000120
410103010031233
5121424404423
611053300023
71533620043
oct423041557
9160612016
1072106863
113777aa54
1220194613
1311c287aa
149810023
1564e4ee3
hex44c436f

72106863 has 8 divisors (see below), whose sum is σ = 100322688. Its totient is φ = 45981144.

The previous prime is 72106861. The next prime is 72106873. The reversal of 72106863 is 36860127.

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

It is not a de Polignac number, because 72106863 - 21 = 72106861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72106861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 522445 + ... + 522582.

It is an arithmetic number, because the mean of its divisors is an integer number (12540336).

Almost surely, 272106863 is an apocalyptic number.

72106863 is a deficient number, since it is larger than the sum of its proper divisors (28215825).

72106863 is a wasteful number, since it uses less digits than its factorization.

72106863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045053.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 72106863 is about 8491.5760021329. The cubic root of 72106863 is about 416.2224813847. Note that the first 3 decimals are identical.

The spelling of 72106863 in words is "seventy-two million, one hundred six thousand, eight hundred sixty-three".

Divisors: 1 3 23 69 1045027 3135081 24035621 72106863