3920778 has 32 divisors (see below), whose sum is σ = 9227520. Its totient is φ = 1229760.

The previous prime is 3920759. The next prime is 3920797. The reversal of 3920778 is 8770293.

It is an interprime number because it is at equal distance from previous prime (3920759) and next prime (3920797).

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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1218 + ... + 3053.

It is an arithmetic number, because the mean of its divisors is an integer number (288360).

Almost surely, 2^3920778 is an apocalyptic number.

3920778 is an abundant number, since it is smaller than the sum of its proper divisors (5306742).

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

3920778 is a wasteful number, since it uses less digits than its factorization.

3920778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4299 (or 4293 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 3920778 is about 1980.0954522447. The cubic root of 3920778 is about 157.6851337727.

The spelling of 3920778 in words is "three million, nine hundred twenty thousand, seven hundred seventy-eight".