1802741985 has 48 divisors (see below), whose sum is σ = 3416931648. Its totient is φ = 871977600.

The previous prime is 1802741971. The next prime is 1802741987. The reversal of 1802741985 is 5891472081.

It is not a de Polignac number, because 1802741985 - 2⁶ = 1802741921 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1802741985.

It is not an unprimeable number, because it can be changed into a prime (1802741987) 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 47 ways as a sum of consecutive naturals, for example, 215175 + ... + 223395.

It is an arithmetic number, because the mean of its divisors is an integer number (71186076).

Almost surely, 2^1802741985 is an apocalyptic number.

1802741985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1802741985 is a deficient number, since it is larger than the sum of its proper divisors (1614189663).

1802741985 is a wasteful number, since it uses less digits than its factorization.

1802741985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8686 (or 8683 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 1802741985 is about 42458.7091772701. The cubic root of 1802741985 is about 1217.0577637620.

The spelling of 1802741985 in words is "one billion, eight hundred two million, seven hundred forty-one thousand, nine hundred eighty-five".