73946640 has 80 divisors (see below), whose sum is σ = 233038656. Its totient is φ = 19392000.

The previous prime is 73946597. The next prime is 73946641. The reversal of 73946640 is 4664937.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (73946641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12115 + ... + 17165.

Almost surely, 2^73946640 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 73946640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116519328).

73946640 is an abundant number, since it is smaller than the sum of its proper divisors (159092016).

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

73946640 is a wasteful number, since it uses less digits than its factorization.

73946640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5128 (or 5122 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 73946640 is about 8599.2232207334. The cubic root of 73946640 is about 419.7327097497.

The spelling of 73946640 in words is "seventy-three million, nine hundred forty-six thousand, six hundred forty".