938728449 has 6 divisors (see below), whose sum is σ = 1355941106. Its totient is φ = 625818960.

The previous prime is 938728379. The next prime is 938728471. The reversal of 938728449 is 944827839.

It can be written as a sum of positive squares in only one way, i.e., 932691600 + 6036849 = 30540^2 + 2457^2 .

It is not a de Polignac number, because 938728449 - 2¹⁷ = 938597377 is a prime.

It is a super-2 number, since 2×938728449² = 1762422201923891202, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 938728395 and 938728404.

It is not an unprimeable number, because it can be changed into a prime (938728489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52151572 + ... + 52151589.

Almost surely, 2^938728449 is an apocalyptic number.

It is an amenable number.

938728449 is a deficient number, since it is larger than the sum of its proper divisors (417212657).

938728449 is a wasteful number, since it uses less digits than its factorization.

938728449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104303167 (or 104303164 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 938728449 is about 30638.6757057155. The cubic root of 938728449 is about 979.1442095090.

The spelling of 938728449 in words is "nine hundred thirty-eight million, seven hundred twenty-eight thousand, four hundred forty-nine".