621037340 has 144 divisors (see below), whose sum is σ = 1667934912. Its totient is φ = 190080000.

The previous prime is 621037297. The next prime is 621037343. The reversal of 621037340 is 43730126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621037343) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1033040 + ... + 1033640.

Almost surely, 2^621037340 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 621037340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (833967456).

621037340 is an abundant number, since it is smaller than the sum of its proper divisors (1046897572).

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

621037340 is a wasteful number, since it uses less digits than its factorization.

621037340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700 (or 687 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 621037340 is about 24920.6207787848. The cubic root of 621037340 is about 853.1771934506.

Adding to 621037340 its reverse (43730126), we get a palindrome (664767466).

The spelling of 621037340 in words is "six hundred twenty-one million, thirty-seven thousand, three hundred forty".