1999478732 has 12 divisors (see below), whose sum is σ = 3704916600. Its totient is φ = 940931136.

The previous prime is 1999478707. The next prime is 1999478753. The reversal of 1999478732 is 2378749991.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14701982 + ... + 14702117.

It is an arithmetic number, because the mean of its divisors is an integer number (308743050).

Almost surely, 2^1999478732 is an apocalyptic number.

It is an amenable number.

1999478732 is a deficient number, since it is larger than the sum of its proper divisors (1705437868).

1999478732 is a wasteful number, since it uses less digits than its factorization.

1999478732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29404120 (or 29404118 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 59.

The square root of 1999478732 is about 44715.5312167931. The cubic root of 1999478732 is about 1259.8115809629.

The spelling of 1999478732 in words is "one billion, nine hundred ninety-nine million, four hundred seventy-eight thousand, seven hundred thirty-two".