1228643398 has 32 divisors (see below), whose sum is σ = 2025216000. Its totient is φ = 556839360.

The previous prime is 1228643389. The next prime is 1228643399. The reversal of 1228643398 is 8933468221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228643399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98983 + ... + 110701.

It is an arithmetic number, because the mean of its divisors is an integer number (63288000).

Almost surely, 2^1228643398 is an apocalyptic number.

1228643398 is a deficient number, since it is larger than the sum of its proper divisors (796572602).

1228643398 is a wasteful number, since it uses less digits than its factorization.

1228643398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11860.

The product of its digits is 497664, while the sum is 46.

The square root of 1228643398 is about 35052.0098995764. The cubic root of 1228643398 is about 1071.0472170965.

The spelling of 1228643398 in words is "one billion, two hundred twenty-eight million, six hundred forty-three thousand, three hundred ninety-eight".