620889 has 8 divisors (see below), whose sum is σ = 840480. Its totient is φ = 407616.

The previous prime is 620887. The next prime is 620909. The reversal of 620889 is 988026.

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

It is not a de Polignac number, because 620889 - 2¹ = 620887 is a prime.

620889 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (620887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1344 + ... + 1745.

It is an arithmetic number, because the mean of its divisors is an integer number (105060).

2⁶²⁰⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

620889 is a deficient number, since it is larger than the sum of its proper divisors (219591).

620889 is a wasteful number, since it uses less digits than its factorization.

620889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 620889 is about 787.9651007500. The cubic root of 620889 is about 85.3109258522.

The spelling of 620889 in words is "six hundred twenty thousand, eight hundred eighty-nine".