3659978 has 8 divisors (see below), whose sum is σ = 6274272. Its totient is φ = 1568556.

The previous prime is 3659959. The next prime is 3659993. The reversal of 3659978 is 8799563.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 130700 + ... + 130727.

It is an arithmetic number, because the mean of its divisors is an integer number (784284).

Almost surely, 2^3659978 is an apocalyptic number.

3659978 is a deficient number, since it is larger than the sum of its proper divisors (2614294).

3659978 is a wasteful number, since it uses less digits than its factorization.

3659978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261436.

The product of its digits is 408240, while the sum is 47.

The square root of 3659978 is about 1913.1068971702. The cubic root of 3659978 is about 154.1083456374.

The spelling of 3659978 in words is "three million, six hundred fifty-nine thousand, nine hundred seventy-eight".