73449680 has 40 divisors (see below), whose sum is σ = 173123592. Its totient is φ = 28975104.

The previous prime is 73449671. The next prime is 73449683. The reversal of 73449680 is 8694437.

It can be written as a sum of positive squares in 4 ways, for example, as 23775376 + 49674304 = 4876^2 + 7048^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73449683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 449 + ... + 12128.

Almost surely, 2^73449680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73449680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86561796).

73449680 is an abundant number, since it is smaller than the sum of its proper divisors (99673912).

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

73449680 is a wasteful number, since it uses less digits than its factorization.

73449680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12663 (or 12657 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 73449680 is about 8570.2788752759. The cubic root of 73449680 is about 418.7903212083.

The spelling of 73449680 in words is "seventy-three million, four hundred forty-nine thousand, six hundred eighty".