1238630398 has 4 divisors (see below), whose sum is σ = 1857945600. Its totient is φ = 619315198.

The previous prime is 1238630381. The next prime is 1238630401. The reversal of 1238630398 is 8930368321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8930368321 = 7 ⋅1275766903.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309657598 + ... + 309657601.

It is an arithmetic number, because the mean of its divisors is an integer number (464486400).

Almost surely, 2^1238630398 is an apocalyptic number.

1238630398 is a deficient number, since it is larger than the sum of its proper divisors (619315202).

1238630398 is an equidigital number, since it uses as much as digits as its factorization.

1238630398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619315201.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 1238630398 is about 35194.1813088471. The cubic root of 1238630398 is about 1073.9413838201.

The spelling of 1238630398 in words is "one billion, two hundred thirty-eight million, six hundred thirty thousand, three hundred ninety-eight".