5651778 has 32 divisors (see below), whose sum is σ = 12983040. Its totient is φ = 1622160.

The previous prime is 5651773. The next prime is 5651801. The reversal of 5651778 is 8771565.

It is a super-2 number, since 2×5651778² = 63885189122568, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (5651771) 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 in 15 ways as a sum of consecutive naturals, for example, 1000 + ... + 3507.

It is an arithmetic number, because the mean of its divisors is an integer number (405720).

Almost surely, 2^5651778 is an apocalyptic number.

5651778 is an abundant number, since it is smaller than the sum of its proper divisors (7331262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5651778 is a wasteful number, since it uses less digits than its factorization.

5651778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4542.

The product of its digits is 58800, while the sum is 39.

The square root of 5651778 is about 2377.3468404926. The cubic root of 5651778 is about 178.1264303979.

The spelling of 5651778 in words is "five million, six hundred fifty-one thousand, seven hundred seventy-eight".