1638000148 has 6 divisors (see below), whose sum is σ = 2866500266. Its totient is φ = 819000072.

The previous prime is 1638000109. The next prime is 1638000163. The reversal of 1638000148 is 8410008361.

It can be written as a sum of positive squares in only one way, i.e., 987342084 + 650658064 = 31422^2 + 25508^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204750015 + ... + 204750022.

Almost surely, 2^1638000148 is an apocalyptic number.

It is an amenable number.

1638000148 is a deficient number, since it is larger than the sum of its proper divisors (1228500118).

1638000148 is a wasteful number, since it uses less digits than its factorization.

1638000148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409500041 (or 409500039 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1638000148 is about 40472.2145181111. The cubic root of 1638000148 is about 1178.7941689391.

The spelling of 1638000148 in words is "one billion, six hundred thirty-eight million, one hundred forty-eight", and thus it is an aban number.