1224173898 has 20 divisors (see below), whose sum is σ = 2743056690. Its totient is φ = 408057912.

The previous prime is 1224173879. The next prime is 1224173903. The reversal of 1224173898 is 8983714221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1223810289 + 363609 = 34983^2 + 603^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3778153 + ... + 3778476.

Almost surely, 2^1224173898 is an apocalyptic number.

1224173898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1224173898 is an abundant number, since it is smaller than the sum of its proper divisors (1518882792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1224173898 is an equidigital number, since it uses as much as digits as its factorization.

1224173898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7556643 (or 7556634 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 1224173898 is about 34988.1965525518. The cubic root of 1224173898 is about 1069.7469043561.

The spelling of 1224173898 in words is "one billion, two hundred twenty-four million, one hundred seventy-three thousand, eight hundred ninety-eight".