1992581144 has 16 divisors (see below), whose sum is σ = 3772363920. Its totient is φ = 986617440.

The previous prime is 1992581137. The next prime is 1992581147. The reversal of 1992581144 is 4411852991.

It is a junction number, because it is equal to n+sod(n) for n = 1992581095 and 1992581104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1992581147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1208267 + ... + 1209914.

It is an arithmetic number, because the mean of its divisors is an integer number (235772745).

Almost surely, 2^1992581144 is an apocalyptic number.

It is an amenable number.

1992581144 is a deficient number, since it is larger than the sum of its proper divisors (1779782776).

1992581144 is a wasteful number, since it uses less digits than its factorization.

1992581144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2418290 (or 2418286 counting only the distinct ones).

The product of its digits is 103680, while the sum is 44.

The square root of 1992581144 is about 44638.3371554094. The cubic root of 1992581144 is about 1258.3612575162.

The spelling of 1992581144 in words is "one billion, nine hundred ninety-two million, five hundred eighty-one thousand, one hundred forty-four".