621442698 has 16 divisors (see below), whose sum is σ = 1255192416. Its totient is φ = 205096400.

The previous prime is 621442697. The next prime is 621442741. The reversal of 621442698 is 896244126.

It is not an unprimeable number, because it can be changed into a prime (621442697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512136 + ... + 513347.

It is an arithmetic number, because the mean of its divisors is an integer number (78449526).

Almost surely, 2^621442698 is an apocalyptic number.

621442698 is an abundant number, since it is smaller than the sum of its proper divisors (633749718).

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

621442698 is a wasteful number, since it uses less digits than its factorization.

621442698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025589.

The product of its digits is 165888, while the sum is 42.

The square root of 621442698 is about 24928.7524356916. The cubic root of 621442698 is about 853.3627791692.

The spelling of 621442698 in words is "six hundred twenty-one million, four hundred forty-two thousand, six hundred ninety-eight".