1999412536 has 16 divisors (see below), whose sum is σ = 4089707640. Its totient is φ = 908823840.

The previous prime is 1999412531. The next prime is 1999412539. The reversal of 1999412536 is 6352149991.

It is a super-2 number, since 2×1999412536² = 7995300978227902592, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1999412536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999412531) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 11360211 + ... + 11360386.

Almost surely, 2^1999412536 is an apocalyptic number.

It is an amenable number.

1999412536 is an abundant number, since it is smaller than the sum of its proper divisors (2090295104).

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

1999412536 is a wasteful number, since it uses less digits than its factorization.

1999412536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22720614 (or 22720610 counting only the distinct ones).

The product of its digits is 524880, while the sum is 49.

The square root of 1999412536 is about 44714.7910204219. The cubic root of 1999412536 is about 1259.7976781047.

The spelling of 1999412536 in words is "one billion, nine hundred ninety-nine million, four hundred twelve thousand, five hundred thirty-six".