4778782 has 4 divisors (see below), whose sum is σ = 7168176. Its totient is φ = 2389390.

The previous prime is 4778777. The next prime is 4778783. The reversal of 4778782 is 2878774.

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

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4778783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1194694 + ... + 1194697.

It is an arithmetic number, because the mean of its divisors is an integer number (1792044).

Almost surely, 2^4778782 is an apocalyptic number.

4778782 is a deficient number, since it is larger than the sum of its proper divisors (2389394).

4778782 is a wasteful number, since it uses less digits than its factorization.

4778782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2389393.

The product of its digits is 175616, while the sum is 43.

The square root of 4778782 is about 2186.0425430444. The cubic root of 4778782 is about 168.4376109988.

The spelling of 4778782 in words is "four million, seven hundred seventy-eight thousand, seven hundred eighty-two".