622026640 has 40 divisors (see below), whose sum is σ = 1449516600. Its totient is φ = 248242176.

The previous prime is 622026619. The next prime is 622026641. The reversal of 622026640 is 46620226.

It can be written as a sum of positive squares in 4 ways, for example, as 182034064 + 439992576 = 13492^2 + 20976^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 622026599 and 622026608.

It is not an unprimeable number, because it can be changed into a prime (622026641) 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, 27262 + ... + 44578.

It is an arithmetic number, because the mean of its divisors is an integer number (36237915).

Almost surely, 2^622026640 is an apocalyptic number.

It is an amenable number.

622026640 is an abundant number, since it is smaller than the sum of its proper divisors (827489960).

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

622026640 is a wasteful number, since it uses less digits than its factorization.

622026640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17779 (or 17773 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 622026640 is about 24940.4619043032. The cubic root of 622026640 is about 853.6299844802.

Adding to 622026640 its reverse (46620226), we get a palindrome (668646866).

The spelling of 622026640 in words is "six hundred twenty-two million, twenty-six thousand, six hundred forty".