1982939840 has 336 divisors, whose sum is σ = 5985552672. Its totient is φ = 621379584.

The previous prime is 1982939813. The next prime is 1982939843. The reversal of 1982939840 is 489392891.

It is not an unprimeable number, because it can be changed into a prime (1982939843) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11461994 + ... + 11462166.

Almost surely, 2^1982939840 is an apocalyptic number.

1982939840 is a gapful number since it is divisible by the number (10) 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 1982939840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2992776336).

1982939840 is an abundant number, since it is smaller than the sum of its proper divisors (4002612832).

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

1982939840 is a wasteful number, since it uses less digits than its factorization.

1982939840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 53.

The square root of 1982939840 is about 44530.2126651109. The cubic root of 1982939840 is about 1256.3284061523.

The spelling of 1982939840 in words is "one billion, nine hundred eighty-two million, nine hundred thirty-nine thousand, eight hundred forty".