622684840 has 64 divisors (see below), whose sum is σ = 1523610000. Its totient is φ = 228077568.

The previous prime is 622684837. The next prime is 622684859. The reversal of 622684840 is 48486226.

It can be written as a sum of positive squares in 8 ways, for example, as 608411556 + 14273284 = 24666^2 + 3778^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 622684793 and 622684802.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12786 + ... + 37534.

Almost surely, 2^622684840 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 622684840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (761805000).

622684840 is an abundant number, since it is smaller than the sum of its proper divisors (900925160).

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

622684840 is a wasteful number, since it uses less digits than its factorization.

622684840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24814 (or 24810 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 40.

The square root of 622684840 is about 24953.6538406703. The cubic root of 622684840 is about 853.9309690137.

The spelling of 622684840 in words is "six hundred twenty-two million, six hundred eighty-four thousand, eight hundred forty".