73838421 has 12 divisors (see below), whose sum is σ = 109538572. Its totient is φ = 47894976.

The previous prime is 73838383. The next prime is 73838423. The reversal of 73838421 is 12483837.

It can be written as a sum of positive squares in 2 ways, for example, as 64160100 + 9678321 = 8010^2 + 3111^2 .

It is not a de Polignac number, because 73838421 - 2⁶ = 73838357 is a prime.

It is a super-2 number, since 2×73838421² = 10904224831546482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73838423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110536 + ... + 111201.

Almost surely, 2^73838421 is an apocalyptic number.

It is an amenable number.

73838421 is a deficient number, since it is larger than the sum of its proper divisors (35700151).

73838421 is a wasteful number, since it uses less digits than its factorization.

73838421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221780 (or 221777 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 73838421 is about 8592.9285461942. The cubic root of 73838421 is about 419.5278537859.

The spelling of 73838421 in words is "seventy-three million, eight hundred thirty-eight thousand, four hundred twenty-one".