622990 has 8 divisors (see below), whose sum is σ = 1121400. Its totient is φ = 249192.

The previous prime is 622987. The next prime is 622997. The reversal of 622990 is 99226.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622997) 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, 31140 + ... + 31159.

It is an arithmetic number, because the mean of its divisors is an integer number (140175).

2⁶²²⁹⁹⁰ is an apocalyptic number.

622990 is a deficient number, since it is larger than the sum of its proper divisors (498410).

622990 is a wasteful number, since it uses less digits than its factorization.

622990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62306.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 622990 is about 789.2971557025. The cubic root of 622990 is about 85.4070441933.

The spelling of 622990 in words is "six hundred twenty-two thousand, nine hundred ninety".