620441672 has 8 divisors (see below), whose sum is σ = 1163328150. Its totient is φ = 310220832.

The previous prime is 620441669. The next prime is 620441677. The reversal of 620441672 is 276144026.

It can be written as a sum of positive squares in only one way, i.e., 434555716 + 185885956 = 20846^2 + 13634^2 .

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 (620441677) 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 as a sum of consecutive naturals, namely, 38777597 + ... + 38777612.

Almost surely, 2^620441672 is an apocalyptic number.

It is an amenable number.

620441672 is a deficient number, since it is larger than the sum of its proper divisors (542886478).

620441672 is a wasteful number, since it uses less digits than its factorization.

620441672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77555215 (or 77555211 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 620441672 is about 24908.6666042163. Note that the first 4 decimals coincide. The cubic root of 620441672 is about 852.9043312088.

Adding to 620441672 its reverse (276144026), we get a palindrome (896585698).

The spelling of 620441672 in words is "six hundred twenty million, four hundred forty-one thousand, six hundred seventy-two".