1820948378 has 16 divisors (see below), whose sum is σ = 2792453184. Its totient is φ = 890329440.

The previous prime is 1820948359. The next prime is 1820948407. The reversal of 1820948378 is 8738490281.

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 7 ways as a sum of consecutive naturals, for example, 31238 + ... + 67953.

It is an arithmetic number, because the mean of its divisors is an integer number (174528324).

Almost surely, 2^1820948378 is an apocalyptic number.

1820948378 is a deficient number, since it is larger than the sum of its proper divisors (971504806).

1820948378 is a wasteful number, since it uses less digits than its factorization.

1820948378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99397.

The product of its (nonzero) digits is 774144, while the sum is 50.

The square root of 1820948378 is about 42672.5717293908. The cubic root of 1820948378 is about 1221.1411829484.

The spelling of 1820948378 in words is "one billion, eight hundred twenty million, nine hundred forty-eight thousand, three hundred seventy-eight".