626222420 has 12 divisors (see below), whose sum is σ = 1315067124. Its totient is φ = 250488960.

The previous prime is 626222419. The next prime is 626222477. The reversal of 626222420 is 24222626.

It can be written as a sum of positive squares in 2 ways, for example, as 188073796 + 438148624 = 13714^2 + 20932^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 626222420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15655541 + ... + 15655580.

It is an arithmetic number, because the mean of its divisors is an integer number (109588927).

Almost surely, 2^626222420 is an apocalyptic number.

It is an amenable number.

626222420 is an abundant number, since it is smaller than the sum of its proper divisors (688844704).

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

626222420 is a wasteful number, since it uses less digits than its factorization.

626222420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31311130 (or 31311128 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 626222420 is about 25024.4364571912. The cubic root of 626222420 is about 855.5450260006.

It can be divided in two parts, 6262 and 22420, that added together give a palindrome (28682).

The spelling of 626222420 in words is "six hundred twenty-six million, two hundred twenty-two thousand, four hundred twenty".