1992997490 has 32 divisors (see below), whose sum is σ = 3977691840. Its totient is φ = 712843200.

The previous prime is 1992997483. The next prime is 1992997493. The reversal of 1992997490 is 947992991.

It is not an unprimeable number, because it can be changed into a prime (1992997493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141800 + ... + 155219.

It is an arithmetic number, because the mean of its divisors is an integer number (124302870).

Almost surely, 2^1992997490 is an apocalyptic number.

1992997490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1992997490 is a deficient number, since it is larger than the sum of its proper divisors (1984694350).

1992997490 is a wasteful number, since it uses less digits than its factorization.

1992997490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297098.

The product of its (nonzero) digits is 3306744, while the sum is 59.

The square root of 1992997490 is about 44643.0004591985. Note that the first 3 decimals coincide. The cubic root of 1992997490 is about 1258.4488954679.

The spelling of 1992997490 in words is "one billion, nine hundred ninety-two million, nine hundred ninety-seven thousand, four hundred ninety".