3557978 has 16 divisors (see below), whose sum is σ = 5676000. Its totient is φ = 1667952.

The previous prime is 3557977. The next prime is 3557987. The reversal of 3557978 is 8797553.

It is a happy number.

3557978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (3557977) 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 7 ways as a sum of consecutive naturals, for example, 3713 + ... + 4571.

It is an arithmetic number, because the mean of its divisors is an integer number (354750).

Almost surely, 2^3557978 is an apocalyptic number.

3557978 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3557978 is a deficient number, since it is larger than the sum of its proper divisors (2118022).

3557978 is a wasteful number, since it uses less digits than its factorization.

3557978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989.

The product of its digits is 264600, while the sum is 44.

The square root of 3557978 is about 1886.2603213767. The cubic root of 3557978 is about 152.6632203880.

The spelling of 3557978 in words is "three million, five hundred fifty-seven thousand, nine hundred seventy-eight".