621334240 has 48 divisors (see below), whose sum is σ = 1515265920. Its totient is φ = 240514560.

The previous prime is 621334237. The next prime is 621334243. The reversal of 621334240 is 42433126.

It is an interprime number because it is at equal distance from previous prime (621334237) and next prime (621334243).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621334243) 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, 57675 + ... + 67594.

It is an arithmetic number, because the mean of its divisors is an integer number (31568040).

Almost surely, 2^621334240 is an apocalyptic number.

It is an amenable number.

621334240 is an abundant number, since it is smaller than the sum of its proper divisors (893931680).

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

621334240 is a wasteful number, since it uses less digits than its factorization.

621334240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125315 (or 125307 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 621334240 is about 24926.5769812062. The cubic root of 621334240 is about 853.3131315747.

Adding to 621334240 its reverse (42433126), we get a palindrome (663767366).

The spelling of 621334240 in words is "six hundred twenty-one million, three hundred thirty-four thousand, two hundred forty".