3918428 has 12 divisors (see below), whose sum is σ = 6960072. Its totient is φ = 1929840.

The previous prime is 3918413. The next prime is 3918443. The reversal of 3918428 is 8248193.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3918413) and next prime (3918443).

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 3 ways as a sum of consecutive naturals, for example, 7043 + ... + 7578.

It is an arithmetic number, because the mean of its divisors is an integer number (580006).

Almost surely, 2^3918428 is an apocalyptic number.

It is an amenable number.

3918428 is a deficient number, since it is larger than the sum of its proper divisors (3041644).

3918428 is a wasteful number, since it uses less digits than its factorization.

3918428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14692 (or 14690 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 3918428 is about 1979.5019575641. The cubic root of 3918428 is about 157.6536235194.

The spelling of 3918428 in words is "three million, nine hundred eighteen thousand, four hundred twenty-eight".