3918920 has 16 divisors (see below), whose sum is σ = 8817660. Its totient is φ = 1567552.

The previous prime is 3918919. The next prime is 3918923. The reversal of 3918920 is 298193.

3918920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3541924 + 376996 = 1882^2 + 614^2 .

It is not an unprimeable number, because it can be changed into a prime (3918923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48947 + ... + 49026.

Almost surely, 2^3918920 is an apocalyptic number.

It is an amenable number.

3918920 is an abundant number, since it is smaller than the sum of its proper divisors (4898740).

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

3918920 is a wasteful number, since it uses less digits than its factorization.

3918920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97984 (or 97980 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 3918920 is about 1979.6262273470. The cubic root of 3918920 is about 157.6602216022.

The spelling of 3918920 in words is "three million, nine hundred eighteen thousand, nine hundred twenty".