1996402885 has 4 divisors (see below), whose sum is σ = 2395683468. Its totient is φ = 1597122304.

The previous prime is 1996402867. The next prime is 1996402913. The reversal of 1996402885 is 5882046991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5882046991 = 37 ⋅158974243.

It can be written as a sum of positive squares in 2 ways, for example, as 1521468036 + 474934849 = 39006^2 + 21793^2 .

It is a cyclic number.

It is not a de Polignac number, because 1996402885 - 2⁷ = 1996402757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199640284 + ... + 199640293.

It is an arithmetic number, because the mean of its divisors is an integer number (598920867).

Almost surely, 2^1996402885 is an apocalyptic number.

It is an amenable number.

1996402885 is a deficient number, since it is larger than the sum of its proper divisors (399280583).

1996402885 is an equidigital number, since it uses as much as digits as its factorization.

1996402885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399280582.

The product of its (nonzero) digits is 1244160, while the sum is 52.

The square root of 1996402885 is about 44681.1244822688. The cubic root of 1996402885 is about 1259.1652497791.

The spelling of 1996402885 in words is "one billion, nine hundred ninety-six million, four hundred two thousand, eight hundred eighty-five".