620623644 has 48 divisors (see below), whose sum is σ = 1521894528. Its totient is φ = 196596288.

The previous prime is 620623643. The next prime is 620623649. The reversal of 620623644 is 446326026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620623643) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2839 + ... + 35345.

It is an arithmetic number, because the mean of its divisors is an integer number (31706136).

Almost surely, 2^620623644 is an apocalyptic number.

It is an amenable number.

620623644 is an abundant number, since it is smaller than the sum of its proper divisors (901270884).

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

620623644 is a wasteful number, since it uses less digits than its factorization.

620623644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32594 (or 32592 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 620623644 is about 24912.3191212701. The cubic root of 620623644 is about 852.9877070484.

The spelling of 620623644 in words is "six hundred twenty million, six hundred twenty-three thousand, six hundred forty-four".