621242340 has 24 divisors (see below), whose sum is σ = 1739478720. Its totient is φ = 165664608.

The previous prime is 621242311. The next prime is 621242341. The reversal of 621242340 is 43242126.

621242340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 621242340.

It is not an unprimeable number, because it can be changed into a prime (621242341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5176960 + ... + 5177079.

It is an arithmetic number, because the mean of its divisors is an integer number (72478280).

Almost surely, 2^621242340 is an apocalyptic number.

621242340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

621242340 is an abundant number, since it is smaller than the sum of its proper divisors (1118236380).

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

621242340 is a wasteful number, since it uses less digits than its factorization.

621242340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10354051 (or 10354049 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 621242340 is about 24924.7334990768. The cubic root of 621242340 is about 853.2710590270.

Adding to 621242340 its reverse (43242126), we get a palindrome (664484466).

The spelling of 621242340 in words is "six hundred twenty-one million, two hundred forty-two thousand, three hundred forty".