3903978 has 16 divisors (see below), whose sum is σ = 8408736. Its totient is φ = 1201200.

The previous prime is 3903973. The next prime is 3904001. The reversal of 3903978 is 8793093.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (3903973) by changing a digit.

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, 24948 + ... + 25103.

It is an arithmetic number, because the mean of its divisors is an integer number (525546).

Almost surely, 2^3903978 is an apocalyptic number.

3903978 is an abundant number, since it is smaller than the sum of its proper divisors (4504758).

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

3903978 is a wasteful number, since it uses less digits than its factorization.

3903978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50069.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 3903978 is about 1975.8486784164. The cubic root of 3903978 is about 157.4595915485.

The spelling of 3903978 in words is "three million, nine hundred three thousand, nine hundred seventy-eight".