1999536 has 80 divisors (see below), whose sum is σ = 6451968. Its totient is φ = 518400.

The previous prime is 1999513. The next prime is 1999537. The reversal of 1999536 is 6359991.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1999537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3426 + ... + 3966.

2^1999536 is an apocalyptic number.

1999536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1999536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3225984).

1999536 is an abundant number, since it is smaller than the sum of its proper divisors (4452432).

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

1999536 is a wasteful number, since it uses less digits than its factorization.

1999536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570 (or 564 counting only the distinct ones).

The product of its digits is 65610, while the sum is 42.

The square root of 1999536 is about 1414.0495040839. The cubic root of 1999536 is about 125.9823608464.

The spelling of 1999536 in words is "one million, nine hundred ninety-nine thousand, five hundred thirty-six".