1802820838 has 48 divisors (see below), whose sum is σ = 3466607760. Its totient is φ = 696596544.

The previous prime is 1802820829. The next prime is 1802820847. The reversal of 1802820838 is 8380282081.

It is an interprime number because it is at equal distance from previous prime (1802820829) and next prime (1802820847).

It is a self number, because there is not a number n which added to its sum of digits gives 1802820838.

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 23 ways as a sum of consecutive naturals, for example, 38328 + ... + 71236.

It is an arithmetic number, because the mean of its divisors is an integer number (72220995).

Almost surely, 2^1802820838 is an apocalyptic number.

1802820838 is a deficient number, since it is larger than the sum of its proper divisors (1663786922).

1802820838 is a wasteful number, since it uses less digits than its factorization.

1802820838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32981 (or 32974 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 40.

The square root of 1802820838 is about 42459.6377516342. The cubic root of 1802820838 is about 1217.0755084453.

The spelling of 1802820838 in words is "one billion, eight hundred two million, eight hundred twenty thousand, eight hundred thirty-eight".