73065640 has 64 divisors (see below), whose sum is σ = 174643200. Its totient is φ = 27433728.

The previous prime is 73065637. The next prime is 73065701. The reversal of 73065640 is 4656037.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96142 + ... + 96898.

It is an arithmetic number, because the mean of its divisors is an integer number (2728800).

Almost surely, 2^73065640 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 73065640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87321600).

73065640 is an abundant number, since it is smaller than the sum of its proper divisors (101577560).

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

73065640 is a wasteful number, since it uses less digits than its factorization.

73065640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914 (or 910 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 73065640 is about 8547.8441726555. The cubic root of 73065640 is about 418.0591477849.

The spelling of 73065640 in words is "seventy-three million, sixty-five thousand, six hundred forty".