1198622798 has 4 divisors (see below), whose sum is σ = 1797934200. Its totient is φ = 599311398.

The previous prime is 1198622779. The next prime is 1198622849. The reversal of 1198622798 is 8972268911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8972268911 = 12539 ⋅715549.

It is a super-2 number, since 2×1198622798² = 2873393223770697608, which contains 22 as substring.

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, 299655698 + ... + 299655701.

It is an arithmetic number, because the mean of its divisors is an integer number (449483550).

Almost surely, 2^1198622798 is an apocalyptic number.

1198622798 is a deficient number, since it is larger than the sum of its proper divisors (599311402).

1198622798 is an equidigital number, since it uses as much as digits as its factorization.

1198622798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599311401.

The product of its digits is 870912, while the sum is 53.

The square root of 1198622798 is about 34621.1322460719. The cubic root of 1198622798 is about 1062.2518870345.

The spelling of 1198622798 in words is "one billion, one hundred ninety-eight million, six hundred twenty-two thousand, seven hundred ninety-eight".