73278825 has 24 divisors (see below), whose sum is σ = 121408896. Its totient is φ = 39000000.

The previous prime is 73278817. The next prime is 73278827. The reversal of 73278825 is 52887237.

It is not a de Polignac number, because 73278825 - 2³ = 73278817 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (73278827) 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 23 ways as a sum of consecutive naturals, for example, 55675 + ... + 56975.

It is an arithmetic number, because the mean of its divisors is an integer number (5058704).

Almost surely, 2^73278825 is an apocalyptic number.

73278825 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

73278825 is a deficient number, since it is larger than the sum of its proper divisors (48130071).

73278825 is a wasteful number, since it uses less digits than its factorization.

73278825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065 (or 2060 counting only the distinct ones).

The product of its digits is 188160, while the sum is 42.

The square root of 73278825 is about 8560.3051931575. The cubic root of 73278825 is about 418.4653460112.

The spelling of 73278825 in words is "seventy-three million, two hundred seventy-eight thousand, eight hundred twenty-five".