1217398224 has 80 divisors (see below), whose sum is σ = 3643532672. Its totient is φ = 343056384.

The previous prime is 1217398223. The next prime is 1217398243. The reversal of 1217398224 is 4228937121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217398223) 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, 289 + ... + 49344.

Almost surely, 2^1217398224 is an apocalyptic number.

1217398224 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1217398224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1821766336).

1217398224 is an abundant number, since it is smaller than the sum of its proper divisors (2426134448).

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

1217398224 is a wasteful number, since it uses less digits than its factorization.

1217398224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49724 (or 49718 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 1217398224 is about 34891.2342000108. The cubic root of 1217398224 is about 1067.7696062096.

The spelling of 1217398224 in words is "one billion, two hundred seventeen million, three hundred ninety-eight thousand, two hundred twenty-four".