621368 has 32 divisors (see below), whose sum is σ = 1330560. Its totient is φ = 269280.

The previous prime is 621359. The next prime is 621371. The reversal of 621368 is 863126.

It is a congruent number.

It is an unprimeable number.

621368 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 1871 + ... + 2177.

It is an arithmetic number, because the mean of its divisors is an integer number (41580).

2⁶²¹³⁶⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (665280).

621368 is an abundant number, since it is smaller than the sum of its proper divisors (709192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

621368 is a wasteful number, since it uses less digits than its factorization.

621368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347 (or 343 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 621368 is about 788.2689896222. The cubic root of 621368 is about 85.3328586128.

It can be divided in two parts, 621 and 368, that added together give a palindrome (989).

The spelling of 621368 in words is "six hundred twenty-one thousand, three hundred sixty-eight".