1820811146 has 96 divisors (see below), whose sum is σ = 3792096000. Its totient is φ = 638415360.

The previous prime is 1820811137. The next prime is 1820811151. The reversal of 1820811146 is 6411180281.

It is a happy number.

It is an unprimeable number.

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, 660980 + ... + 663728.

It is an arithmetic number, because the mean of its divisors is an integer number (39501000).

Almost surely, 2^1820811146 is an apocalyptic number.

1820811146 is an abundant number, since it is smaller than the sum of its proper divisors (1971284854).

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

1820811146 is a wasteful number, since it uses less digits than its factorization.

1820811146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2820 (or 2809 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 32.

The square root of 1820811146 is about 42670.9637341366. The cubic root of 1820811146 is about 1221.1105059197.

The spelling of 1820811146 in words is "one billion, eight hundred twenty million, eight hundred eleven thousand, one hundred forty-six".