621272340 has 144 divisors (see below), whose sum is σ = 2057856528. Its totient is φ = 150792192.

The previous prime is 621272329. The next prime is 621272341. The reversal of 621272340 is 43272126.

621272340 is a `hidden beast` number, since 621 + 2 + 7 + 2 + 34 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 165791376 + 455480964 = 12876^2 + 21342^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621272341) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 169002 + ... + 172638.

Almost surely, 2^621272340 is an apocalyptic number.

621272340 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 621272340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1028928264).

621272340 is an abundant number, since it is smaller than the sum of its proper divisors (1436584188).

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

621272340 is a wasteful number, since it uses less digits than its factorization.

621272340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3738 (or 3733 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 621272340 is about 24925.3353036624. The cubic root of 621272340 is about 853.2847937207.

The spelling of 621272340 in words is "six hundred twenty-one million, two hundred seventy-two thousand, three hundred forty".