4547978 has 4 divisors (see below), whose sum is σ = 6821970. Its totient is φ = 2273988.

The previous prime is 4547957. The next prime is 4548001. The reversal of 4547978 is 8797454.

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 + 1151329 = 1843^2 + 1073^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1136993 + ... + 1136996.

Almost surely, 2^4547978 is an apocalyptic number.

4547978 is a deficient number, since it is larger than the sum of its proper divisors (2273992).

4547978 is a wasteful number, since it uses less digits than its factorization.

4547978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273991.

The product of its digits is 282240, while the sum is 44.

The square root of 4547978 is about 2132.5988839911. The cubic root of 4547978 is about 165.6810297203.

It can be divided in two parts, 4 and 547978, that multiplied together give a palindrome (2191912).

The spelling of 4547978 in words is "four million, five hundred forty-seven thousand, nine hundred seventy-eight".