1986493258 has 8 divisors (see below), whose sum is σ = 3043138752. Its totient is φ = 972113676.

The previous prime is 1986493241. The next prime is 1986493273. The reversal of 1986493258 is 8523946891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1986493199 and 1986493208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10566360 + ... + 10566547.

It is an arithmetic number, because the mean of its divisors is an integer number (380392344).

Almost surely, 2^1986493258 is an apocalyptic number.

1986493258 is a deficient number, since it is larger than the sum of its proper divisors (1056645494).

1986493258 is a wasteful number, since it uses less digits than its factorization.

1986493258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21132956.

The product of its digits is 3732480, while the sum is 55.

The square root of 1986493258 is about 44570.0937625220. The cubic root of 1986493258 is about 1257.0784030156.

The spelling of 1986493258 in words is "one billion, nine hundred eighty-six million, four hundred ninety-three thousand, two hundred fifty-eight".