620767240 has 128 divisors (see below), whose sum is σ = 1625184000. Its totient is φ = 211673088.

The previous prime is 620767187. The next prime is 620767247. The reversal of 620767240 is 42767026.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 620767196 and 620767205.

It is not an unprimeable number, because it can be changed into a prime (620767247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 296116 + ... + 298204.

It is an arithmetic number, because the mean of its divisors is an integer number (12696750).

Almost surely, 2^620767240 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 620767240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (812592000).

620767240 is an abundant number, since it is smaller than the sum of its proper divisors (1004416760).

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

620767240 is a wasteful number, since it uses less digits than its factorization.

620767240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159 (or 2155 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 620767240 is about 24915.2009825327. The cubic root of 620767240 is about 853.0534882877.

The spelling of 620767240 in words is "six hundred twenty million, seven hundred sixty-seven thousand, two hundred forty".