1999487580 has 48 divisors (see below), whose sum is σ = 5693466240. Its totient is φ = 524158528.

The previous prime is 1999487579. The next prime is 1999487597. The reversal of 1999487580 is 857849991.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

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, 278874 + ... + 285953.

It is an arithmetic number, because the mean of its divisors is an integer number (118613880).

Almost surely, 2^1999487580 is an apocalyptic number.

1999487580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1999487580 is an abundant number, since it is smaller than the sum of its proper divisors (3693978660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1999487580 is a wasteful number, since it uses less digits than its factorization.

1999487580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564898 (or 564896 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 60.

The square root of 1999487580 is about 44715.6301532249. The cubic root of 1999487580 is about 1259.8134392466.

The spelling of 1999487580 in words is "one billion, nine hundred ninety-nine million, four hundred eighty-seven thousand, five hundred eighty".