73067640 has 32 divisors (see below), whose sum is σ = 219203280. Its totient is φ = 19484672.

The previous prime is 73067627. The next prime is 73067641. The reversal of 73067640 is 4676037.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73067641) 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, 304329 + ... + 304568.

Almost surely, 2^73067640 is an apocalyptic number.

It is an amenable number.

73067640 is an abundant number, since it is smaller than the sum of its proper divisors (146135640).

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

73067640 is a wasteful number, since it uses less digits than its factorization.

73067640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608911 (or 608907 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 33.

The square root of 73067640 is about 8547.9611604171. The cubic root of 73067640 is about 418.0629622120.

The spelling of 73067640 in words is "seventy-three million, sixty-seven thousand, six hundred forty".