47838442 has 16 divisors (see below), whose sum is σ = 76195080. Its totient is φ = 22448128.

The previous prime is 47838419. The next prime is 47838443. The reversal of 47838442 is 24483874.

It can be written as a sum of positive squares in 4 ways, for example, as 26020201 + 21818241 = 5101^2 + 4671^2 .

It is a junction number, because it is equal to n+sod(n) for n = 47838395 and 47838404.

It is not an unprimeable number, because it can be changed into a prime (47838443) 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, 11418 + ... + 15034.

Almost surely, 2^47838442 is an apocalyptic number.

47838442 is a deficient number, since it is larger than the sum of its proper divisors (28356638).

47838442 is a wasteful number, since it uses less digits than its factorization.

47838442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4025.

The product of its digits is 172032, while the sum is 40.

The square root of 47838442 is about 6916.5339585662. The cubic root of 47838442 is about 363.0159236337.

It can be divided in two parts, 4783 and 8442, that added together give a square (13225 = 115²).

The spelling of 47838442 in words is "forty-seven million, eight hundred thirty-eight thousand, four hundred forty-two".