1983487620 has 24 divisors (see below), whose sum is σ = 5553765504. Its totient is φ = 528930016.

The previous prime is 1983487619. The next prime is 1983487621. The reversal of 1983487620 is 267843891.

It is an interprime number because it is at equal distance from previous prime (1983487619) and next prime (1983487621).

It is a self number, because there is not a number n which added to its sum of digits gives 1983487620.

It is not an unprimeable number, because it can be changed into a prime (1983487621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16529004 + ... + 16529123.

It is an arithmetic number, because the mean of its divisors is an integer number (231406896).

Almost surely, 2^1983487620 is an apocalyptic number.

1983487620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1983487620 is an abundant number, since it is smaller than the sum of its proper divisors (3570277884).

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

1983487620 is a wasteful number, since it uses less digits than its factorization.

1983487620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33058139 (or 33058137 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 1983487620 is about 44536.3628959528. The cubic root of 1983487620 is about 1256.4440809028. Note that the first 3 decimals are identical.

The spelling of 1983487620 in words is "one billion, nine hundred eighty-three million, four hundred eighty-seven thousand, six hundred twenty".