621028 has 12 divisors (see below), whose sum is σ = 1097712. Its totient is φ = 307400.

The previous prime is 621017. The next prime is 621029. The reversal of 621028 is 820126.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 620996 and 621014.

It is not an unprimeable number, because it can be changed into a prime (621029) 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 3 ways as a sum of consecutive naturals, for example, 298 + ... + 1153.

It is an arithmetic number, because the mean of its divisors is an integer number (91476).

2⁶²¹⁰²⁸ is an apocalyptic number.

It is an amenable number.

621028 is a deficient number, since it is larger than the sum of its proper divisors (476684).

621028 is a wasteful number, since it uses less digits than its factorization.

621028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562 (or 1560 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 621028 is about 788.0532976899. The cubic root of 621028 is about 85.3172916351.

It can be divided in two parts, 62 and 1028, that multiplied together give a palindrome (63736).

The spelling of 621028 in words is "six hundred twenty-one thousand, twenty-eight".