1982197930 has 8 divisors (see below), whose sum is σ = 3567956292. Its totient is φ = 792879168.

The previous prime is 1982197837. The next prime is 1982197979. The reversal of 1982197930 is 397912891.

It can be written as a sum of positive squares in 2 ways, for example, as 1960098529 + 22099401 = 44273^2 + 4701^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99109887 + ... + 99109906.

Almost surely, 2^1982197930 is an apocalyptic number.

1982197930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1982197930 is a deficient number, since it is larger than the sum of its proper divisors (1585758362).

1982197930 is a wasteful number, since it uses less digits than its factorization.

1982197930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198219800.

The product of its (nonzero) digits is 244944, while the sum is 49.

The square root of 1982197930 is about 44521.8814741695. The cubic root of 1982197930 is about 1256.1717029822.

The spelling of 1982197930 in words is "one billion, nine hundred eighty-two million, one hundred ninety-seven thousand, nine hundred thirty".