5721778 has 8 divisors (see below), whose sum is σ = 8611200. Its totient is φ = 2851380.

The previous prime is 5721767. The next prime is 5721797. The reversal of 5721778 is 8771275.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3978 + ... + 5221.

It is an arithmetic number, because the mean of its divisors is an integer number (1076400).

Almost surely, 2^5721778 is an apocalyptic number.

5721778 is a deficient number, since it is larger than the sum of its proper divisors (2889422).

5721778 is a wasteful number, since it uses less digits than its factorization.

5721778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9512.

The product of its digits is 27440, while the sum is 37.

The square root of 5721778 is about 2392.0238293127. The cubic root of 5721778 is about 178.8588090028.

The spelling of 5721778 in words is "five million, seven hundred twenty-one thousand, seven hundred seventy-eight".