1217392390228 has 24 divisors (see below), whose sum is σ = 2434911070592. Its totient is φ = 521712533664.

The previous prime is 1217392390219. The next prime is 1217392390271. The reversal of 1217392390228 is 8220932937121.

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, 573351 + ... + 1662382.

Almost surely, 2^{1217392390228} is an apocalyptic number.

It is an amenable number.

1217392390228 is an abundant number, since it is smaller than the sum of its proper divisors (1217518680364).

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

1217392390228 is a wasteful number, since it uses less digits than its factorization.

1217392390228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255191 (or 2255189 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 1217392390228 in words is "one trillion, two hundred seventeen billion, three hundred ninety-two million, three hundred ninety thousand, two hundred twenty-eight".