1983434445 has 30 divisors (see below), whose sum is σ = 3557097258. Its totient is φ = 1057353696.

The previous prime is 1983434437. The next prime is 1983434449. The reversal of 1983434445 is 5444343891.

It can be written as a sum of positive squares in 3 ways, for example, as 1443848004 + 539586441 = 37998^2 + 23229^2 .

It is not a de Polignac number, because 1983434445 - 2³ = 1983434437 is a prime.

It is a super-2 number, since 2×1983434445² = 7868024395224916050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1983434445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1983434449) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 895159 + ... + 897371.

Almost surely, 2^1983434445 is an apocalyptic number.

1983434445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1983434445 is a deficient number, since it is larger than the sum of its proper divisors (1573662813).

1983434445 is an frugal number, since it uses more digits than its factorization.

1983434445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4443 (or 2221 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 1983434445 is about 44535.7659078633. The cubic root of 1983434445 is about 1256.4328528668.

Multiplying 1983434445 by its sum of digits (45), we get a square (89254550025 = 298755²).

1983434445 divided by its sum of digits (45) gives a square (44076321 = 6639²).

The spelling of 1983434445 in words is "one billion, nine hundred eighty-three million, four hundred thirty-four thousand, four hundred forty-five".