621598842 has 12 divisors (see below), whose sum is σ = 1346797530. Its totient is φ = 207199608.

The previous prime is 621598819. The next prime is 621598877. The reversal of 621598842 is 248895126.

It can be written as a sum of positive squares in only one way, i.e., 613008081 + 8590761 = 24759^2 + 2931^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17266617 + ... + 17266652.

Almost surely, 2^621598842 is an apocalyptic number.

621598842 is an abundant number, since it is smaller than the sum of its proper divisors (725198688).

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

621598842 is a wasteful number, since it uses less digits than its factorization.

621598842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34533277 (or 34533274 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 621598842 is about 24931.8840443317. The cubic root of 621598842 is about 853.4342453021.

The spelling of 621598842 in words is "six hundred twenty-one million, five hundred ninety-eight thousand, eight hundred forty-two".