620620856 has 8 divisors (see below), whose sum is σ = 1163664120. Its totient is φ = 310310424.

The previous prime is 620620801. The next prime is 620620859. The reversal of 620620856 is 658026026.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620620859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38788796 + ... + 38788811.

It is an arithmetic number, because the mean of its divisors is an integer number (145458015).

Almost surely, 2^620620856 is an apocalyptic number.

It is an amenable number.

620620856 is a deficient number, since it is larger than the sum of its proper divisors (543043264).

620620856 is a wasteful number, since it uses less digits than its factorization.

620620856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77577613 (or 77577609 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 620620856 is about 24912.2631649555. The cubic root of 620620856 is about 852.9864297669.

The spelling of 620620856 in words is "six hundred twenty million, six hundred twenty thousand, eight hundred fifty-six".