1997223320 has 32 divisors (see below), whose sum is σ = 4497519600. Its totient is φ = 798219648.

The previous prime is 1997223317. The next prime is 1997223341. The reversal of 1997223320 is 233227991.

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, 28847 + ... + 69473.

Almost surely, 2^1997223320 is an apocalyptic number.

1997223320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1997223320 is an abundant number, since it is smaller than the sum of its proper divisors (2500296280).

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

1997223320 is a wasteful number, since it uses less digits than its factorization.

1997223320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41867 (or 41863 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 1997223320 is about 44690.3045413656. The cubic root of 1997223320 is about 1259.3377135917.

The spelling of 1997223320 in words is "one billion, nine hundred ninety-seven million, two hundred twenty-three thousand, three hundred twenty".