73278730 has 32 divisors (see below), whose sum is σ = 155612160. Its totient is φ = 24312960.

The previous prime is 73278727. The next prime is 73278731. The reversal of 73278730 is 3787237.

It is a self number, because there is not a number n which added to its sum of digits gives 73278730.

It is not an unprimeable number, because it can be changed into a prime (73278731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14715 + ... + 19054.

It is an arithmetic number, because the mean of its divisors is an integer number (4862880).

Almost surely, 2^73278730 is an apocalyptic number.

73278730 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

73278730 is an abundant number, since it is smaller than the sum of its proper divisors (82333430).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

73278730 is a wasteful number, since it uses less digits than its factorization.

73278730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33814.

The product of its (nonzero) digits is 49392, while the sum is 37.

The square root of 73278730 is about 8560.2996442882. The cubic root of 73278730 is about 418.4651651758.

The spelling of 73278730 in words is "seventy-three million, two hundred seventy-eight thousand, seven hundred thirty".