1990862727 has 16 divisors (see below), whose sum is σ = 3165596160. Its totient is φ = 1088173152.

The previous prime is 1990862689. The next prime is 1990862729. The reversal of 1990862727 is 7272680991.

It is not a de Polignac number, because 1990862727 - 2²⁴ = 1974085511 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1990862727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990862729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2060452 + ... + 2061417.

It is an arithmetic number, because the mean of its divisors is an integer number (197849760).

Almost surely, 2^1990862727 is an apocalyptic number.

1990862727 is a deficient number, since it is larger than the sum of its proper divisors (1174733433).

1990862727 is a wasteful number, since it uses less digits than its factorization.

1990862727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4121902.

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 1990862727 is about 44619.0847844283. The cubic root of 1990862727 is about 1257.9994133989. Note that the first 3 decimals are identical.

The spelling of 1990862727 in words is "one billion, nine hundred ninety million, eight hundred sixty-two thousand, seven hundred twenty-seven".