1986463674 has 24 divisors (see below), whose sum is σ = 4635082452. Its totient is φ = 611219520.

The previous prime is 1986463649. The next prime is 1986463681. The reversal of 1986463674 is 4763646891.

It can be written as a sum of positive squares in 2 ways, for example, as 1611460449 + 375003225 = 40143^2 + 19365^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1986463674.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4244347 + ... + 4244814.

Almost surely, 2^1986463674 is an apocalyptic number.

1986463674 is an abundant number, since it is smaller than the sum of its proper divisors (2648618778).

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

1986463674 is a wasteful number, since it uses less digits than its factorization.

1986463674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8489182 (or 8489179 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The square root of 1986463674 is about 44569.7618795524. The cubic root of 1986463674 is about 1257.0721626064.

It can be divided in two parts, 19864 and 63674, that added together give a palindrome (83538).

The spelling of 1986463674 in words is "one billion, nine hundred eighty-six million, four hundred sixty-three thousand, six hundred seventy-four".