621344 has 12 divisors (see below), whose sum is σ = 1223334. Its totient is φ = 310656.

The previous prime is 621343. The next prime is 621347. The reversal of 621344 is 443126.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 620944 + 400 = 788^2 + 20^2 .

It is not an unprimeable number, because it can be changed into a prime (621343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9677 + ... + 9740.

2⁶²¹³⁴⁴ is an apocalyptic number.

It is an amenable number.

621344 is a deficient number, since it is larger than the sum of its proper divisors (601990).

621344 is a wasteful number, since it uses less digits than its factorization.

621344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19427 (or 19419 counting only the distinct ones).

The product of its digits is 576, while the sum is 20.

The square root of 621344 is about 788.2537662454. The cubic root of 621344 is about 85.3317599536.

It can be divided in two parts, 6213 and 44, that multiplied together give a palindrome (273372).

The spelling of 621344 in words is "six hundred twenty-one thousand, three hundred forty-four".