3881778 has 16 divisors (see below), whose sum is σ = 7783776. Its totient is φ = 1290560.

The previous prime is 3881743. The next prime is 3881803. The reversal of 3881778 is 8771883.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 3013 + ... + 4103.

It is an arithmetic number, because the mean of its divisors is an integer number (486486).

Almost surely, 2^3881778 is an apocalyptic number.

3881778 is an abundant number, since it is smaller than the sum of its proper divisors (3901998).

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

3881778 is a wasteful number, since it uses less digits than its factorization.

3881778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689.

The product of its digits is 75264, while the sum is 42.

The square root of 3881778 is about 1970.2228300373. Note that the first 3 decimals coincide. The cubic root of 3881778 is about 157.1605589661.

The spelling of 3881778 in words is "three million, eight hundred eighty-one thousand, seven hundred seventy-eight".