983811988 has 6 divisors (see below), whose sum is σ = 1721670986. Its totient is φ = 491905992.

The previous prime is 983811967. The next prime is 983812003. The reversal of 983811988 is 889118389.

It can be written as a sum of positive squares in only one way, i.e., 787475844 + 196336144 = 28062^2 + 14012^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122976495 + ... + 122976502.

Almost surely, 2^983811988 is an apocalyptic number.

It is an amenable number.

983811988 is a deficient number, since it is larger than the sum of its proper divisors (737858998).

983811988 is a wasteful number, since it uses less digits than its factorization.

983811988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245953001 (or 245952999 counting only the distinct ones).

The product of its digits is 995328, while the sum is 55.

The square root of 983811988 is about 31365.7773377291. Note that the first 3 decimals coincide. The cubic root of 983811988 is about 994.5746144231.

The spelling of 983811988 in words is "nine hundred eighty-three million, eight hundred eleven thousand, nine hundred eighty-eight".