6391722 has 16 divisors (see below), whose sum is σ = 12808512. Its totient is φ = 2126400.

The previous prime is 6391717. The next prime is 6391727. The reversal of 6391722 is 2271936.

It is an interprime number because it is at equal distance from previous prime (6391717) and next prime (6391727).

It is a super-2 number, since 2×6391722² = 81708220250568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6391722.

It is not an unprimeable number, because it can be changed into a prime (6391727) 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 7 ways as a sum of consecutive naturals, for example, 4722 + ... + 5922.

It is an arithmetic number, because the mean of its divisors is an integer number (800532).

Almost surely, 2^6391722 is an apocalyptic number.

6391722 is an abundant number, since it is smaller than the sum of its proper divisors (6416790).

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

6391722 is a wasteful number, since it uses less digits than its factorization.

6391722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2093.

The product of its digits is 4536, while the sum is 30.

The square root of 6391722 is about 2528.1855153449. The cubic root of 6391722 is about 185.5834707399.

The spelling of 6391722 in words is "six million, three hundred ninety-one thousand, seven hundred twenty-two".