1217604372 has 96 divisors (see below), whose sum is σ = 2972712960. Its totient is φ = 387636480.

The previous prime is 1217604371. The next prime is 1217604403. The reversal of 1217604372 is 2734067121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217604371) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6374797 + ... + 6374987.

It is an arithmetic number, because the mean of its divisors is an integer number (30965760).

Almost surely, 2^1217604372 is an apocalyptic number.

1217604372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1217604372 is an abundant number, since it is smaller than the sum of its proper divisors (1755108588).

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

1217604372 is a wasteful number, since it uses less digits than its factorization.

1217604372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 1217604372 is about 34894.1882266947. The cubic root of 1217604372 is about 1067.8298730259.

The spelling of 1217604372 in words is "one billion, two hundred seventeen million, six hundred four thousand, three hundred seventy-two".