73691648 has 40 divisors (see below), whose sum is σ = 148310448. Its totient is φ = 36578304.

The previous prime is 73691647. The next prime is 73691663. The reversal of 73691648 is 84619637.

It is a junction number, because it is equal to n+sod(n) for n = 73691599 and 73691608.

It is not an unprimeable number, because it can be changed into a prime (73691641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83015 + ... + 83897.

Almost surely, 2^73691648 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 73691648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74155224).

73691648 is an abundant number, since it is smaller than the sum of its proper divisors (74618800).

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

73691648 is an equidigital number, since it uses as much as digits as its factorization.

73691648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064 (or 1048 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 73691648 is about 8584.3839615898. The cubic root of 73691648 is about 419.2496959517.

The spelling of 73691648 in words is "seventy-three million, six hundred ninety-one thousand, six hundred forty-eight".