622406 has 4 divisors (see below), whose sum is σ = 933612. Its totient is φ = 311202.

The previous prime is 622399. The next prime is 622423. The reversal of 622406 is 604226.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

622406 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155600 + ... + 155603.

It is an arithmetic number, because the mean of its divisors is an integer number (233403).

2⁶²²⁴⁰⁶ is an apocalyptic number.

622406 is a deficient number, since it is larger than the sum of its proper divisors (311206).

622406 is a wasteful number, since it uses less digits than its factorization.

622406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311205.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 622406 is about 788.9271195744. The cubic root of 622406 is about 85.3803485763.

The spelling of 622406 in words is "six hundred twenty-two thousand, four hundred six".