1999432 has 16 divisors (see below), whose sum is σ = 3766140. Its totient is φ = 995136.

The previous prime is 1999423. The next prime is 1999441. The reversal of 1999432 is 2349991.

It is an interprime number because it is at equal distance from previous prime (1999423) and next prime (1999441).

It can be written as a sum of positive squares in 2 ways, for example, as 1999396 + 36 = 1414^2 + 6^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1999391 and 1999400.

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, 1918 + ... + 2770.

2^1999432 is an apocalyptic number.

It is an amenable number.

1999432 is a deficient number, since it is larger than the sum of its proper divisors (1766708).

1999432 is a wasteful number, since it uses less digits than its factorization.

1999432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152 (or 1148 counting only the distinct ones).

The product of its digits is 17496, while the sum is 37.

The square root of 1999432 is about 1414.0127297871. The cubic root of 1999432 is about 125.9801766076.

The spelling of 1999432 in words is "one million, nine hundred ninety-nine thousand, four hundred thirty-two".