1992591216 has 540 divisors, whose sum is σ = 7664228208. Its totient is φ = 471398400.

The previous prime is 1992591197. The next prime is 1992591217. The reversal of 1992591216 is 6121952991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1992591217) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 64277121 + ... + 64277151.

Almost surely, 2^1992591216 is an apocalyptic number.

1992591216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1992591216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3832114104).

1992591216 is an abundant number, since it is smaller than the sum of its proper divisors (5671636992).

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

1992591216 is a wasteful number, since it uses less digits than its factorization.

1992591216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 71 counting only the distinct ones).

The product of its digits is 87480, while the sum is 45.

The square root of 1992591216 is about 44638.4499730893. The cubic root of 1992591216 is about 1258.3633777466.

The spelling of 1992591216 in words is "one billion, nine hundred ninety-two million, five hundred ninety-one thousand, two hundred sixteen".