983957840 has 20 divisors (see below), whose sum is σ = 2287702164. Its totient is φ = 393583104.

The previous prime is 983957839. The next prime is 983957861. The reversal of 983957840 is 48759389.

It can be written as a sum of positive squares in 2 ways, for example, as 431143696 + 552814144 = 20764^2 + 23512^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6149657 + ... + 6149816.

Almost surely, 2^983957840 is an apocalyptic number.

It is an amenable number.

983957840 is an abundant number, since it is smaller than the sum of its proper divisors (1303744324).

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

983957840 is a wasteful number, since it uses less digits than its factorization.

983957840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12299486 (or 12299480 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 983957840 is about 31368.1022696624. The cubic root of 983957840 is about 994.6237611877.

The spelling of 983957840 in words is "nine hundred eighty-three million, nine hundred fifty-seven thousand, eight hundred forty".