1986291952 has 20 divisors (see below), whose sum is σ = 3853756816. Its totient is φ = 991774080.

The previous prime is 1986291949. The next prime is 1986291959. The reversal of 1986291952 is 2591926891.

It is a self number, because there is not a number n which added to its sum of digits gives 1986291952.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986291959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73749 + ... + 97012.

Almost surely, 2^1986291952 is an apocalyptic number.

It is an amenable number.

1986291952 is a deficient number, since it is larger than the sum of its proper divisors (1867464864).

1986291952 is a wasteful number, since it uses less digits than its factorization.

1986291952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171496 (or 171490 counting only the distinct ones).

The product of its digits is 699840, while the sum is 52.

The square root of 1986291952 is about 44567.8353972907. The cubic root of 1986291952 is about 1257.0359385752.

The spelling of 1986291952 in words is "one billion, nine hundred eighty-six million, two hundred ninety-one thousand, nine hundred fifty-two".