7720422 has 16 divisors (see below), whose sum is σ = 16253760. Its totient is φ = 2437992.

The previous prime is 7720399. The next prime is 7720429. The reversal of 7720422 is 2240277.

It is a junction number, because it is equal to n+sod(n) for n = 7720392 and 7720401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7720429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33748 + ... + 33975.

It is an arithmetic number, because the mean of its divisors is an integer number (1015860).

Almost surely, 2^7720422 is an apocalyptic number.

7720422 is an abundant number, since it is smaller than the sum of its proper divisors (8533338).

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

7720422 is a wasteful number, since it uses less digits than its factorization.

7720422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67747.

The product of its (nonzero) digits is 1568, while the sum is 24.

The square root of 7720422 is about 2778.5647374139. The cubic root of 7720422 is about 197.6425035736.

Adding to 7720422 its reverse (2240277), we get a palindrome (9960699).

The spelling of 7720422 in words is "seven million, seven hundred twenty thousand, four hundred twenty-two".