621267240 has 96 divisors (see below), whose sum is σ = 2048689440. Its totient is φ = 150606720.

The previous prime is 621267209. The next prime is 621267247. The reversal of 621267240 is 42762126.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 621267198 and 621267207.

It is not an unprimeable number, because it can be changed into a prime (621267247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6874 + ... + 35913.

It is an arithmetic number, because the mean of its divisors is an integer number (21340515).

Almost surely, 2^621267240 is an apocalyptic number.

621267240 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 621267240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1024344720).

621267240 is an abundant number, since it is smaller than the sum of its proper divisors (1427422200).

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

621267240 is a wasteful number, since it uses less digits than its factorization.

621267240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42823 (or 42808 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 621267240 is about 24925.2329979080. The cubic root of 621267240 is about 853.2824588539.

The spelling of 621267240 in words is "six hundred twenty-one million, two hundred sixty-seven thousand, two hundred forty".