620390 has 8 divisors (see below), whose sum is σ = 1116720. Its totient is φ = 248152.

The previous prime is 620383. The next prime is 620393. The reversal of 620390 is 93026.

It is a happy number.

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

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620393) by changing a digit.

620390 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 in 3 ways as a sum of consecutive naturals, for example, 31010 + ... + 31029.

It is an arithmetic number, because the mean of its divisors is an integer number (139590).

2⁶²⁰³⁹⁰ is an apocalyptic number.

620390 is a deficient number, since it is larger than the sum of its proper divisors (496330).

620390 is a wasteful number, since it uses less digits than its factorization.

620390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62046.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 620390 is about 787.6483987161. The cubic root of 620390 is about 85.2880653186.

The spelling of 620390 in words is "six hundred twenty thousand, three hundred ninety".