1228953998 has 4 divisors (see below), whose sum is σ = 1843431000. Its totient is φ = 614476998.

The previous prime is 1228953997. The next prime is 1228954003. The reversal of 1228953998 is 8993598221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8993598221 = 43 ⋅209153447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228953997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307238498 + ... + 307238501.

It is an arithmetic number, because the mean of its divisors is an integer number (460857750).

Almost surely, 2^1228953998 is an apocalyptic number.

1228953998 is a deficient number, since it is larger than the sum of its proper divisors (614477002).

1228953998 is an equidigital number, since it uses as much as digits as its factorization.

1228953998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614477001.

The product of its digits is 2799360, while the sum is 56.

The square root of 1228953998 is about 35056.4401786605. The cubic root of 1228953998 is about 1071.1374627656.

The spelling of 1228953998 in words is "one billion, two hundred twenty-eight million, nine hundred fifty-three thousand, nine hundred ninety-eight".