1138320398 has 4 divisors (see below), whose sum is σ = 1707480600. Its totient is φ = 569160198.

The previous prime is 1138320389. The next prime is 1138320409. The reversal of 1138320398 is 8930238311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8930238311 = 2713 ⋅3291647.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 284580098 + ... + 284580101.

It is an arithmetic number, because the mean of its divisors is an integer number (426870150).

Almost surely, 2^1138320398 is an apocalyptic number.

1138320398 is a deficient number, since it is larger than the sum of its proper divisors (569160202).

1138320398 is an equidigital number, since it uses as much as digits as its factorization.

1138320398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569160201.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 1138320398 is about 33739.0041050414. The cubic root of 1138320398 is about 1044.1306378070.

The spelling of 1138320398 in words is "one billion, one hundred thirty-eight million, three hundred twenty thousand, three hundred ninety-eight".