1322117820 has 72 divisors (see below), whose sum is σ = 4014759840. Its totient is φ = 352183680.

The previous prime is 1322117803. The next prime is 1322117833. The reversal of 1322117820 is 287112231.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 188985 + ... + 195855.

Almost surely, 2^1322117820 is an apocalyptic number.

1322117820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1322117820 is an abundant number, since it is smaller than the sum of its proper divisors (2692642020).

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

1322117820 is a wasteful number, since it uses less digits than its factorization.

1322117820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7955 (or 7950 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 1322117820 is about 36360.9381067101. The cubic root of 1322117820 is about 1097.5476552523.

The spelling of 1322117820 in words is "one billion, three hundred twenty-two million, one hundred seventeen thousand, eight hundred twenty".