1220669684 has 12 divisors (see below), whose sum is σ = 2300492964. Its totient is φ = 563385984.

The previous prime is 1220669677. The next prime is 1220669693. The reversal of 1220669684 is 4869660221.

It can be written as a sum of positive squares in 2 ways, for example, as 207648100 + 1013021584 = 14410^2 + 31828^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11737157 + ... + 11737260.

It is an arithmetic number, because the mean of its divisors is an integer number (191707747).

Almost surely, 2^1220669684 is an apocalyptic number.

It is an amenable number.

1220669684 is a deficient number, since it is larger than the sum of its proper divisors (1079823280).

1220669684 is a wasteful number, since it uses less digits than its factorization.

1220669684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23474434 (or 23474432 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 1220669684 is about 34938.0835765215. The cubic root of 1220669684 is about 1068.7252072997.

The spelling of 1220669684 in words is "one billion, two hundred twenty million, six hundred sixty-nine thousand, six hundred eighty-four".