1638266282 has 4 divisors (see below), whose sum is σ = 2457399426. Its totient is φ = 819133140.

The previous prime is 1638266281. The next prime is 1638266321. The reversal of 1638266282 is 2826628361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2826628361 = 67 ⋅42188483.

It can be written as a sum of positive squares in only one way, i.e., 894667921 + 743598361 = 29911^2 + 27269^2 .

It is a super-3 number, since 3×1638266282³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1638266281) 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 as a sum of consecutive naturals, namely, 409566569 + ... + 409566572.

Almost surely, 2^1638266282 is an apocalyptic number.

1638266282 is a deficient number, since it is larger than the sum of its proper divisors (819133144).

1638266282 is an equidigital number, since it uses as much as digits as its factorization.

1638266282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819133143.

The product of its digits is 331776, while the sum is 44.

The square root of 1638266282 is about 40475.5022451853. The cubic root of 1638266282 is about 1178.8580069916.

The spelling of 1638266282 in words is "one billion, six hundred thirty-eight million, two hundred sixty-six thousand, two hundred eighty-two".