621198808 has 16 divisors (see below), whose sum is σ = 1182133080. Its totient is φ = 305963328.

The previous prime is 621198803. The next prime is 621198817. The reversal of 621198808 is 808891126.

621198808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621198803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578941 + ... + 580012.

Almost surely, 2^621198808 is an apocalyptic number.

It is an amenable number.

621198808 is a deficient number, since it is larger than the sum of its proper divisors (560934272).

621198808 is a wasteful number, since it uses less digits than its factorization.

621198808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159026 (or 1159022 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 43.

The square root of 621198808 is about 24923.8602146618. The cubic root of 621198808 is about 853.2511282845.

The spelling of 621198808 in words is "six hundred twenty-one million, one hundred ninety-eight thousand, eight hundred eight".