1217608772 has 12 divisors (see below), whose sum is σ = 2132383680. Its totient is φ = 608356296.

The previous prime is 1217608771. The next prime is 1217608789. The reversal of 1217608772 is 2778067121.

It is a super-2 number, since 2×1217608772² = 2965142243302695968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1217608771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105872 + ... + 116807.

It is an arithmetic number, because the mean of its divisors is an integer number (177698640).

Almost surely, 2^1217608772 is an apocalyptic number.

It is an amenable number.

1217608772 is a deficient number, since it is larger than the sum of its proper divisors (914774908).

1217608772 is a wasteful number, since it uses less digits than its factorization.

1217608772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224050 (or 224048 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 41.

The square root of 1217608772 is about 34894.2512743862. The cubic root of 1217608772 is about 1067.8311592800.

The spelling of 1217608772 in words is "one billion, two hundred seventeen million, six hundred eight thousand, seven hundred seventy-two".