1983500478 has 48 divisors (see below), whose sum is σ = 4559493120. Its totient is φ = 621422928.

The previous prime is 1983500423. The next prime is 1983500503. The reversal of 1983500478 is 8740053891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20601 + ... + 66267.

It is an arithmetic number, because the mean of its divisors is an integer number (94989440).

Almost surely, 2^1983500478 is an apocalyptic number.

1983500478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1983500478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2279746560).

1983500478 is an abundant number, since it is smaller than the sum of its proper divisors (2575992642).

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

1983500478 is a wasteful number, since it uses less digits than its factorization.

1983500478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45821 (or 45818 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 1983500478 is about 44536.5072496710. The cubic root of 1983500478 is about 1256.4467958720.

The spelling of 1983500478 in words is "one billion, nine hundred eighty-three million, five hundred thousand, four hundred seventy-eight".