4778591 has 8 divisors (see below), whose sum is σ = 5065200. Its totient is φ = 4500160.

The previous prime is 4778569. The next prime is 4778593. The reversal of 4778591 is 1958774.

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

It is not a de Polignac number, because 4778591 - 2¹⁰ = 4777567 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4778593) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 821 + ... + 3198.

It is an arithmetic number, because the mean of its divisors is an integer number (633150).

Almost surely, 2^4778591 is an apocalyptic number.

4778591 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

4778591 is a deficient number, since it is larger than the sum of its proper divisors (286609).

4778591 is a wasteful number, since it uses less digits than its factorization.

4778591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4089.

The product of its digits is 70560, while the sum is 41.

The square root of 4778591 is about 2185.9988563583. The cubic root of 4778591 is about 168.4353669115.

The spelling of 4778591 in words is "four million, seven hundred seventy-eight thousand, five hundred ninety-one".