621604576 has 12 divisors (see below), whose sum is σ = 1223784072. Its totient is φ = 310802272.

The previous prime is 621604573. The next prime is 621604597. The reversal of 621604576 is 675406126.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621604573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9712540 + ... + 9712603.

It is an arithmetic number, because the mean of its divisors is an integer number (101982006).

Almost surely, 2^621604576 is an apocalyptic number.

It is an amenable number.

621604576 is a deficient number, since it is larger than the sum of its proper divisors (602179496).

621604576 is a wasteful number, since it uses less digits than its factorization.

621604576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19425153 (or 19425145 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 621604576 is about 24931.9990373817. Note that the first 3 decimals coincide. The cubic root of 621604576 is about 853.4368694903.

The spelling of 621604576 in words is "six hundred twenty-one million, six hundred four thousand, five hundred seventy-six".