738323821 has 8 divisors (see below), whose sum is σ = 782785080. Its totient is φ = 693977088.

The previous prime is 738323801. The next prime is 738323881. The reversal of 738323821 is 128323837.

738323821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 21958596 + 716365225 = 4686^2 + 26765^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 738323821 - 2⁷ = 738323693 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 (738323801) 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, 15166 + ... + 41311.

It is an arithmetic number, because the mean of its divisors is an integer number (97848135).

Almost surely, 2^738323821 is an apocalyptic number.

It is an amenable number.

738323821 is a deficient number, since it is larger than the sum of its proper divisors (44461259).

738323821 is a wasteful number, since it uses less digits than its factorization.

738323821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57263.

The product of its digits is 48384, while the sum is 37.

The square root of 738323821 is about 27172.1147686374. The cubic root of 738323821 is about 903.8207205272.

The spelling of 738323821 in words is "seven hundred thirty-eight million, three hundred twenty-three thousand, eight hundred twenty-one".