• 622 can be written using four 4's:

622 has 4 divisors (see below), whose sum is σ = 936. Its totient is φ = 310.

The previous prime is 619. The next prime is 631. The reversal of 622 is 226.

It is a happy number.

622 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

622 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 226 = 2 ⋅113.

622 is a modest number, since divided by 22 gives 6 as remainder.

It is a plaindrome in base 8, base 13 and base 16.

It is a nialpdrome in base 5, base 9 and base 10.

It is a junction number, because it is equal to *n*+sod(*n*) for *n* = 599 and 608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154 + ... + 157.

It is an arithmetic number, because the mean of its divisors is an integer number (234).

622 is a deficient number, since it is larger than the sum of its proper divisors (314).

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

622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313.

The product of its digits is 24, while the sum is 10.

The square root of 622 is about 24.9399278267. The cubic root of 622 is about 8.5361779796.

Adding to 622 its product of digits (24), we get a palindrome (646).

Adding to 622 its reverse (226), we get a palindrome (848).

It can be divided in two parts, 62 and 2, that added together give a 6-th power (64 = 2^{6}).

The spelling of 622 in words is "six hundred twenty-two", and thus it is an aban number.

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