9942438490 has 16 divisors (see below), whose sum is σ = 17929479240. Its totient is φ = 3969622080.

The previous prime is 9942438439. The next prime is 9942438497. The reversal of 9942438490 is 948342499.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9709540369 + 232898121 = 98537^2 + 15261^2 .

It is not an unprimeable number, because it can be changed into a prime (9942438497) 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, 913485 + ... + 924304.

Almost surely, 2^9942438490 is an apocalyptic number.

9942438490 is a deficient number, since it is larger than the sum of its proper divisors (7987040750).

9942438490 is a wasteful number, since it uses less digits than its factorization.

9942438490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1838337.

The product of its (nonzero) digits is 2239488, while the sum is 52.

The square root of 9942438490 is about 99711.7770877643. Note that the first 3 decimals coincide. The cubic root of 9942438490 is about 2150.2929826079.

The spelling of 9942438490 in words is "nine billion, nine hundred forty-two million, four hundred thirty-eight thousand, four hundred ninety".