73278463 has 6 divisors (see below), whose sum is σ = 75313896. Its totient is φ = 71296632.

The previous prime is 73278409. The next prime is 73278467. The reversal of 73278463 is 36487237.

It is a happy number.

It is not a de Polignac number, because 73278463 - 2²¹ = 71181311 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 (73278467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25395 + ... + 28132.

It is an arithmetic number, because the mean of its divisors is an integer number (12552316).

Almost surely, 2^73278463 is an apocalyptic number.

73278463 is a deficient number, since it is larger than the sum of its proper divisors (2035433).

73278463 is an equidigital number, since it uses as much as digits as its factorization.

73278463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53601 (or 53564 counting only the distinct ones).

The product of its digits is 169344, while the sum is 40.

The square root of 73278463 is about 8560.2840490255. The cubic root of 73278463 is about 418.4646569322.

It can be divided in two parts, 7327846 and 3, that added together give a square (7327849 = 2707²).

The spelling of 73278463 in words is "seventy-three million, two hundred seventy-eight thousand, four hundred sixty-three".