1930001805 has 48 divisors (see below), whose sum is σ = 3411720000. Its totient is φ = 1009010688.

The previous prime is 1930001797. The next prime is 1930001831. The reversal of 1930001805 is 5081000391.

It is not a de Polignac number, because 1930001805 - 2³ = 1930001797 is a prime.

It is a Curzon number.

It is a congruent 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, 1191286 + ... + 1192904.

It is an arithmetic number, because the mean of its divisors is an integer number (71077500).

Almost surely, 2^1930001805 is an apocalyptic number.

1930001805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1930001805 is a deficient number, since it is larger than the sum of its proper divisors (1481718195).

1930001805 is a wasteful number, since it uses less digits than its factorization.

1930001805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138 (or 2135 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1930001805 is about 43931.7858161946. The cubic root of 1930001805 is about 1245.0474554902.

The spelling of 1930001805 in words is "one billion, nine hundred thirty million, one thousand, eight hundred five".