1990463587 has 8 divisors (see below), whose sum is σ = 2302223616. Its totient is φ = 1685555592.

The previous prime is 1990463569. The next prime is 1990463591. The reversal of 1990463587 is 7853640991.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1990463587 - 2¹⁹ = 1989939299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1990463287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1712383 + ... + 1713544.

It is an arithmetic number, because the mean of its divisors is an integer number (287777952).

Almost surely, 2^1990463587 is an apocalyptic number.

1990463587 is a deficient number, since it is larger than the sum of its proper divisors (311760029).

1990463587 is an equidigital number, since it uses as much as digits as its factorization.

1990463587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3426017.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The square root of 1990463587 is about 44614.6118104820. The cubic root of 1990463587 is about 1257.9153373786.

The spelling of 1990463587 in words is "one billion, nine hundred ninety million, four hundred sixty-three thousand, five hundred eighty-seven".