6722890 has 8 divisors (see below), whose sum is σ = 12101220. Its totient is φ = 2689152.

The previous prime is 6722879. The next prime is 6722899. The reversal of 6722890 is 982276.

It can be written as a sum of positive squares in 2 ways, for example, as 5716881 + 1006009 = 2391^2 + 1003^2 .

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6722899) 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 3 ways as a sum of consecutive naturals, for example, 336135 + ... + 336154.

Almost surely, 2^6722890 is an apocalyptic number.

6722890 is a deficient number, since it is larger than the sum of its proper divisors (5378330).

6722890 is a wasteful number, since it uses less digits than its factorization.

6722890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672296.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 6722890 is about 2592.8536402967. The cubic root of 6722890 is about 188.7348071920.

The spelling of 6722890 in words is "six million, seven hundred twenty-two thousand, eight hundred ninety".