1988322612 has 24 divisors (see below), whose sum is σ = 4655261856. Its totient is φ = 660511008.

The previous prime is 1988322599. The next prime is 1988322683. The reversal of 1988322612 is 2162238891.

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, 279238 + ... + 286269.

It is an arithmetic number, because the mean of its divisors is an integer number (193969244).

Almost surely, 2^1988322612 is an apocalyptic number.

1988322612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1988322612 is an abundant number, since it is smaller than the sum of its proper divisors (2666939244).

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

1988322612 is a wasteful number, since it uses less digits than its factorization.

1988322612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565807 (or 565805 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 1988322612 is about 44590.6112539400. The cubic root of 1988322612 is about 1257.4641641797.

The spelling of 1988322612 in words is "one billion, nine hundred eighty-eight million, three hundred twenty-two thousand, six hundred twelve".