1991983058 has 96 divisors (see below), whose sum is σ = 3620132352. Its totient is φ = 817689600.

The previous prime is 1991983051. The next prime is 1991983067. The reversal of 1991983058 is 8503891991.

It is a super-3 number, since 3×1991983058³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is not an unprimeable number, because it can be changed into a prime (1991983051) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9440573 + ... + 9440783.

It is an arithmetic number, because the mean of its divisors is an integer number (37709712).

Almost surely, 2^1991983058 is an apocalyptic number.

1991983058 is a deficient number, since it is larger than the sum of its proper divisors (1628149294).

1991983058 is a wasteful number, since it uses less digits than its factorization.

1991983058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 53.

The square root of 1991983058 is about 44631.6374111459. The cubic root of 1991983058 is about 1258.2353431854.

The spelling of 1991983058 in words is "one billion, nine hundred ninety-one million, nine hundred eighty-three thousand, fifty-eight".