1999505472 has 28 divisors (see below), whose sum is σ = 5290358736. Its totient is φ = 666501760.

The previous prime is 1999505449. The next prime is 1999505477. The reversal of 1999505472 is 2745059991.

It is not an unprimeable number, because it can be changed into a prime (1999505477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5206854 + ... + 5207237.

Almost surely, 2^1999505472 is an apocalyptic number.

1999505472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1999505472 is an abundant number, since it is smaller than the sum of its proper divisors (3290853264).

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

1999505472 is a wasteful number, since it uses less digits than its factorization.

1999505472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10414106 (or 10414096 counting only the distinct ones).

The product of its (nonzero) digits is 1020600, while the sum is 51.

The square root of 1999505472 is about 44715.8302170495. The cubic root of 1999505472 is about 1259.8171969619.

The spelling of 1999505472 in words is "one billion, nine hundred ninety-nine million, five hundred five thousand, four hundred seventy-two".