4511978 has 4 divisors (see below), whose sum is σ = 6767970. Its totient is φ = 2255988.

The previous prime is 4511971. The next prime is 4511989. The reversal of 4511978 is 8791154.

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., 3545689 + 966289 = 1883^2 + 983^2 .

It is not an unprimeable number, because it can be changed into a prime (4511971) 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 as a sum of consecutive naturals, namely, 1127993 + ... + 1127996.

Almost surely, 2^4511978 is an apocalyptic number.

4511978 is a deficient number, since it is larger than the sum of its proper divisors (2255992).

4511978 is a wasteful number, since it uses less digits than its factorization.

4511978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2255991.

The product of its digits is 10080, while the sum is 35.

The square root of 4511978 is about 2124.1417090204. The cubic root of 4511978 is about 165.2427159442.

The spelling of 4511978 in words is "four million, five hundred eleven thousand, nine hundred seventy-eight".