1217797488 has 30 divisors (see below), whose sum is σ = 3408141984. Its totient is φ = 405932448.

The previous prime is 1217797481. The next prime is 1217797489. The reversal of 1217797488 is 8847977121.

1217797488 is a `hidden beast` number, since 1 + 2 + 1 + 77 + 97 + 488 = 666.

It is a super-2 number, since 2×1217797488² = 2966061443558220288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217797481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4228320 + ... + 4228607.

Almost surely, 2^1217797488 is an apocalyptic number.

1217797488 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1217797488 is an abundant number, since it is smaller than the sum of its proper divisors (2190344496).

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

1217797488 is a wasteful number, since it uses less digits than its factorization.

1217797488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8456941 (or 8456932 counting only the distinct ones).

The product of its digits is 1580544, while the sum is 54.

The square root of 1217797488 is about 34896.9552826604. The cubic root of 1217797488 is about 1067.8863238013.

The spelling of 1217797488 in words is "one billion, two hundred seventeen million, seven hundred ninety-seven thousand, four hundred eighty-eight".