620621706 has 8 divisors (see below), whose sum is σ = 1241243424. Its totient is φ = 206873900.

The previous prime is 620621657. The next prime is 620621713. The reversal of 620621706 is 607126026.

It is a sphenic number, since it is the product of 3 distinct primes.

620621706 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51718470 + ... + 51718481.

It is an arithmetic number, because the mean of its divisors is an integer number (155155428).

Almost surely, 2^620621706 is an apocalyptic number.

620621706 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

620621706 is a wasteful number, since it uses less digits than its factorization.

620621706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103436956.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 620621706 is about 24912.2802248209. The cubic root of 620621706 is about 852.9868191824.

The spelling of 620621706 in words is "six hundred twenty million, six hundred twenty-one thousand, seven hundred six".