73447380 has 36 divisors (see below), whose sum is σ = 222790932. Its totient is φ = 19585920.

The previous prime is 73447379. The next prime is 73447393. The reversal of 73447380 is 8374437.

It can be written as a sum of positive squares in 2 ways, for example, as 16112196 + 57335184 = 4014^2 + 7572^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 203841 + ... + 204200.

It is an arithmetic number, because the mean of its divisors is an integer number (6188637).

Almost surely, 2^73447380 is an apocalyptic number.

It is an amenable number.

73447380 is an abundant number, since it is smaller than the sum of its proper divisors (149343552).

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

73447380 is a wasteful number, since it uses less digits than its factorization.

73447380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408056 (or 408051 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 73447380 is about 8570.1446895604. The cubic root of 73447380 is about 418.7859498356.

The spelling of 73447380 in words is "seventy-three million, four hundred forty-seven thousand, three hundred eighty".