738608321 has 6 divisors (see below), whose sum is σ = 811858866. Its totient is φ = 671462000.

The previous prime is 738608293. The next prime is 738608359. The reversal of 738608321 is 123806837.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 534118321 + 204490000 = 23111^2 + 14300^2 .

It is not a de Polignac number, because 738608321 - 2¹⁰ = 738607297 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (732608321) 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, 3051980 + ... + 3052221.

It is an arithmetic number, because the mean of its divisors is an integer number (135309811).

Almost surely, 2^738608321 is an apocalyptic number.

It is an amenable number.

738608321 is a deficient number, since it is larger than the sum of its proper divisors (73250545).

738608321 is a wasteful number, since it uses less digits than its factorization.

738608321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6104223 (or 6104212 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 738608321 is about 27177.3494108605. The cubic root of 738608321 is about 903.9367960517.

The spelling of 738608321 in words is "seven hundred thirty-eight million, six hundred eight thousand, three hundred twenty-one".