1992053644 has 72 divisors (see below), whose sum is σ = 4259098368. Its totient is φ = 811308960.

The previous prime is 1992053611. The next prime is 1992053663. The reversal of 1992053644 is 4463502991.

It is a self number, because there is not a number n which added to its sum of digits gives 1992053644.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 733449 + ... + 736159.

It is an arithmetic number, because the mean of its divisors is an integer number (59154144).

Almost surely, 2^1992053644 is an apocalyptic number.

1992053644 is a gapful number since it is divisible by the number (14) 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 1992053644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2129549184).

1992053644 is an abundant number, since it is smaller than the sum of its proper divisors (2267044724).

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

1992053644 is a wasteful number, since it uses less digits than its factorization.

1992053644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2915 (or 2906 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 1992053644 is about 44632.4281660767. The cubic root of 1992053644 is about 1258.2502048832.

The spelling of 1992053644 in words is "one billion, nine hundred ninety-two million, fifty-three thousand, six hundred forty-four".