1217244160 has 88 divisors (see below), whose sum is σ = 3185557776. Its totient is φ = 442613760.

The previous prime is 1217244113. The next prime is 1217244187. The reversal of 1217244160 is 614427121.

It is a tau number, because it is divible by the number of its divisors (88).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45514 + ... + 67126.

Almost surely, 2^1217244160 is an apocalyptic number.

1217244160 is a gapful number since it is divisible by the number (10) 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 1217244160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1592778888).

1217244160 is an abundant number, since it is smaller than the sum of its proper divisors (1968313616).

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

1217244160 is a wasteful number, since it uses less digits than its factorization.

1217244160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21649 (or 21631 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1217244160 is about 34889.0263550017. The cubic root of 1217244160 is about 1067.7245615690.

The spelling of 1217244160 in words is "one billion, two hundred seventeen million, two hundred forty-four thousand, one hundred sixty".