1986712828 has 12 divisors (see below), whose sum is σ = 3497567472. Its totient is φ = 987407840.

The previous prime is 1986712823. The next prime is 1986712829. The reversal of 1986712828 is 8282176891.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986712823) by changing a digit.

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, 1486393 + ... + 1487728.

It is an arithmetic number, because the mean of its divisors is an integer number (291463956).

Almost surely, 2^1986712828 is an apocalyptic number.

It is an amenable number.

1986712828 is a deficient number, since it is larger than the sum of its proper divisors (1510854644).

1986712828 is a wasteful number, since it uses less digits than its factorization.

1986712828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2974292 (or 2974290 counting only the distinct ones).

The product of its digits is 774144, while the sum is 52.

The square root of 1986712828 is about 44572.5568932275. The cubic root of 1986712828 is about 1257.1247168796.

The spelling of 1986712828 in words is "one billion, nine hundred eighty-six million, seven hundred twelve thousand, eight hundred twenty-eight".