1238630399 has 4 divisors (see below), whose sum is σ = 1240460664. Its totient is φ = 1236800136.

The previous prime is 1238630381. The next prime is 1238630401. The reversal of 1238630399 is 9930368321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1238630399 - 2⁸ = 1238630143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238630359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914117 + ... + 915470.

It is an arithmetic number, because the mean of its divisors is an integer number (310115166).

Almost surely, 2^1238630399 is an apocalyptic number.

1238630399 is a deficient number, since it is larger than the sum of its proper divisors (1830265).

1238630399 is an equidigital number, since it uses as much as digits as its factorization.

1238630399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830264.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 1238630399 is about 35194.1813230540. The cubic root of 1238630399 is about 1073.9413841091.

The spelling of 1238630399 in words is "one billion, two hundred thirty-eight million, six hundred thirty thousand, three hundred ninety-nine".