1212885328 has 20 divisors (see below), whose sum is σ = 2430999540. Its totient is φ = 585530624.

The previous prime is 1212885319. The next prime is 1212885367. The reversal of 1212885328 is 8235882121.

It can be written as a sum of positive squares in 2 ways, for example, as 433805584 + 779079744 = 20828^2 + 27912^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1306525 + ... + 1307452.

It is an arithmetic number, because the mean of its divisors is an integer number (121549977).

Almost surely, 2^1212885328 is an apocalyptic number.

It is an amenable number.

1212885328 is an abundant number, since it is smaller than the sum of its proper divisors (1218114212).

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

1212885328 is a wasteful number, since it uses less digits than its factorization.

1212885328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2614014 (or 2614008 counting only the distinct ones).

The product of its digits is 61440, while the sum is 40.

The square root of 1212885328 is about 34826.5032410663. The cubic root of 1212885328 is about 1066.4485649563.

The spelling of 1212885328 in words is "one billion, two hundred twelve million, eight hundred eighty-five thousand, three hundred twenty-eight".