3427978 has 4 divisors (see below), whose sum is σ = 5141970. Its totient is φ = 1713988.

The previous prime is 3427973. The next prime is 3427981. The reversal of 3427978 is 8797243.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3396649 + 31329 = 1843^2 + 177^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 3427978.

It is not an unprimeable number, because it can be changed into a prime (3427973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 856993 + ... + 856996.

Almost surely, 2^3427978 is an apocalyptic number.

3427978 is a deficient number, since it is larger than the sum of its proper divisors (1713992).

3427978 is a wasteful number, since it uses less digits than its factorization.

3427978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713991.

The product of its digits is 84672, while the sum is 40.

The square root of 3427978 is about 1851.4799485817. The cubic root of 3427978 is about 150.7807880081.

It can be divided in two parts, 34279 and 78, that multiplied together give a palindrome (2673762).

The spelling of 3427978 in words is "three million, four hundred twenty-seven thousand, nine hundred seventy-eight".