621360 has 60 divisors (see below), whose sum is σ = 2089152. Its totient is φ = 165504.

The previous prime is 621359. The next prime is 621371. The reversal of 621360 is 63126.

It is a happy number.

621360 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 289 + ... + 1151.

2⁶²¹³⁶⁰ is an apocalyptic number.

621360 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1044576).

621360 is an abundant number, since it is smaller than the sum of its proper divisors (1467792).

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

621360 is a wasteful number, since it uses less digits than its factorization.

621360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882 (or 873 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 621360 is about 788.2639151959. The cubic root of 621360 is about 85.3324923962.

Adding to 621360 its reverse (63126), we get a palindrome (684486).

The spelling of 621360 in words is "six hundred twenty-one thousand, three hundred sixty".