1638412298 has 16 divisors (see below), whose sum is σ = 2644846344. Its totient is φ = 758376960.

The previous prime is 1638412297. The next prime is 1638412327. The reversal of 1638412298 is 8922148361.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 792591409 + 845820889 = 28153^2 + 29083^2 .

It is not an unprimeable number, because it can be changed into a prime (1638412297) 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, 392915 + ... + 397062.

Almost surely, 2^1638412298 is an apocalyptic number.

1638412298 is a deficient number, since it is larger than the sum of its proper divisors (1006434046).

1638412298 is a wasteful number, since it uses less digits than its factorization.

1638412298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790057.

The product of its digits is 165888, while the sum is 44.

The square root of 1638412298 is about 40477.3059627243. The cubic root of 1638412298 is about 1178.8930291812.

It can be divided in two parts, 16384 and 12298, that added together give a palindrome (28682).

The spelling of 1638412298 in words is "one billion, six hundred thirty-eight million, four hundred twelve thousand, two hundred ninety-eight".