622857 has 4 divisors (see below), whose sum is σ = 830480. Its totient is φ = 415236.

The previous prime is 622849. The next prime is 622861. The reversal of 622857 is 758226.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 622857 - 2³ = 622849 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (622157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103807 + ... + 103812.

It is an arithmetic number, because the mean of its divisors is an integer number (207620).

2⁶²²⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

622857 is a deficient number, since it is larger than the sum of its proper divisors (207623).

622857 is a wasteful number, since it uses less digits than its factorization.

622857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207622.

The product of its digits is 6720, while the sum is 30.

The square root of 622857 is about 789.2128990330. The cubic root of 622857 is about 85.4009660084.

The spelling of 622857 in words is "six hundred twenty-two thousand, eight hundred fifty-seven".