621944 has 8 divisors (see below), whose sum is σ = 1166160. Its totient is φ = 310968.

The previous prime is 621941. The next prime is 621983. The reversal of 621944 is 449126.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38864 + ... + 38879.

It is an arithmetic number, because the mean of its divisors is an integer number (145770).

2⁶²¹⁹⁴⁴ is an apocalyptic number.

It is an amenable number.

621944 is a deficient number, since it is larger than the sum of its proper divisors (544216).

621944 is a wasteful number, since it uses less digits than its factorization.

621944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77749 (or 77745 counting only the distinct ones).

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

The square root of 621944 is about 788.6342625070. The cubic root of 621944 is about 85.3592179504.

The spelling of 621944 in words is "six hundred twenty-one thousand, nine hundred forty-four".