1986872825 has 72 divisors (see below), whose sum is σ = 3025556352. Its totient is φ = 1287982080.

The previous prime is 1986872809. The next prime is 1986872857. The reversal of 1986872825 is 5282786891.

It is a happy number.

It is not a de Polignac number, because 1986872825 - 2⁴ = 1986872809 is a prime.

It is a Curzon number.

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 71 ways as a sum of consecutive naturals, for example, 2732612 + ... + 2733338.

It is an arithmetic number, because the mean of its divisors is an integer number (42021616).

Almost surely, 2^1986872825 is an apocalyptic number.

It is an amenable number.

1986872825 is a deficient number, since it is larger than the sum of its proper divisors (1038683527).

1986872825 is a wasteful number, since it uses less digits than its factorization.

1986872825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871 (or 859 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 56.

The square root of 1986872825 is about 44574.3516497997. The cubic root of 1986872825 is about 1257.1584628714.

The spelling of 1986872825 in words is "one billion, nine hundred eighty-six million, eight hundred seventy-two thousand, eight hundred twenty-five".