1930001778 has 48 divisors (see below), whose sum is σ = 4224366432. Its totient is φ = 636792000.

The previous prime is 1930001771. The next prime is 1930001797. The reversal of 1930001778 is 8771000391.

It is a super-2 number, since 2×1930001778² = 7449813726166322568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1930001771) 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 23 ways as a sum of consecutive naturals, for example, 1227733 + ... + 1229303.

It is an arithmetic number, because the mean of its divisors is an integer number (88007634).

Almost surely, 2^1930001778 is an apocalyptic number.

1930001778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1930001778 is an abundant number, since it is smaller than the sum of its proper divisors (2294364654).

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

1930001778 is a wasteful number, since it uses less digits than its factorization.

1930001778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231 (or 2228 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 1930001778 is about 43931.7855089000. The cubic root of 1930001778 is about 1245.0474496843.

The spelling of 1930001778 in words is "one billion, nine hundred thirty million, one thousand, seven hundred seventy-eight".