378851890 has 32 divisors (see below), whose sum is σ = 700113456. Its totient is φ = 147517440.

The previous prime is 378851873. The next prime is 378851933. The reversal of 378851890 is 98158873.

It can be written as a sum of positive squares in 8 ways, for example, as 150872089 + 227979801 = 12283^2 + 15099^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275244 + ... + 276616.

Almost surely, 2^378851890 is an apocalyptic number.

378851890 is a deficient number, since it is larger than the sum of its proper divisors (321261566).

378851890 is a wasteful number, since it uses less digits than its factorization.

378851890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2094.

The product of its (nonzero) digits is 483840, while the sum is 49.

The square root of 378851890 is about 19464.1180123837. The cubic root of 378851890 is about 723.5854399994.

The spelling of 378851890 in words is "three hundred seventy-eight million, eight hundred fifty-one thousand, eight hundred ninety".