621147040 has 96 divisors (see below), whose sum is σ = 1514842560. Its totient is φ = 240543744.

The previous prime is 621147013. The next prime is 621147041. The reversal of 621147040 is 40741126.

It is a junction number, because it is equal to n+sod(n) for n = 621146996 and 621147014.

It is not an unprimeable number, because it can be changed into a prime (621147041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 942231 + ... + 942889.

It is an arithmetic number, because the mean of its divisors is an integer number (15779610).

Almost surely, 2^621147040 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 621147040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (757421280).

621147040 is an abundant number, since it is smaller than the sum of its proper divisors (893695520).

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

621147040 is a wasteful number, since it uses less digits than its factorization.

621147040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854 (or 846 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 621147040 is about 24922.8216701079. The cubic root of 621147040 is about 853.2274255498.

Adding to 621147040 its reverse (40741126), we get a palindrome (661888166).

The spelling of 621147040 in words is "six hundred twenty-one million, one hundred forty-seven thousand, forty".