620656424 has 8 divisors (see below), whose sum is σ = 1163730810. Its totient is φ = 310328208.

The previous prime is 620656423. The next prime is 620656427. The reversal of 620656424 is 424656026.

It can be written as a sum of positive squares in only one way, i.e., 520296100 + 100360324 = 22810^2 + 10018^2 .

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

It is not an unprimeable number, because it can be changed into a prime (620656423) 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, 38791019 + ... + 38791034.

Almost surely, 2^620656424 is an apocalyptic number.

It is an amenable number.

620656424 is a deficient number, since it is larger than the sum of its proper divisors (543074386).

620656424 is a wasteful number, since it uses less digits than its factorization.

620656424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77582059 (or 77582055 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 620656424 is about 24912.9770200191. The cubic root of 620656424 is about 853.0027244399.

The spelling of 620656424 in words is "six hundred twenty million, six hundred fifty-six thousand, four hundred twenty-four".