73721376 has 36 divisors (see below), whose sum is σ = 209645982. Its totient is φ = 24573696.

The previous prime is 73721363. The next prime is 73721377. The reversal of 73721376 is 67312737.

It can be written as a sum of positive squares in only one way, i.e., 73616400 + 104976 = 8580^2 + 324^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 73721376.

It is not an unprimeable number, because it can be changed into a prime (73721377) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 127701 + ... + 128276.

Almost surely, 2^73721376 is an apocalyptic number.

It is an amenable number.

73721376 is an abundant number, since it is smaller than the sum of its proper divisors (135924606).

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

73721376 is a wasteful number, since it uses less digits than its factorization.

73721376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255993 (or 255982 counting only the distinct ones).

The product of its digits is 37044, while the sum is 36.

The square root of 73721376 is about 8586.1153032090. The cubic root of 73721376 is about 419.3060649781.

The spelling of 73721376 in words is "seventy-three million, seven hundred twenty-one thousand, three hundred seventy-six".