620107644 has 96 divisors (see below), whose sum is σ = 1606823680. Its totient is φ = 186024384.

The previous prime is 620107643. The next prime is 620107661. The reversal of 620107644 is 446701026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620107643) 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 in 31 ways as a sum of consecutive naturals, for example, 1133379 + ... + 1133925.

Almost surely, 2^620107644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620107644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (803411840).

620107644 is an abundant number, since it is smaller than the sum of its proper divisors (986716036).

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

620107644 is a wasteful number, since it uses less digits than its factorization.

620107644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636 (or 608 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 620107644 is about 24901.9606457002. The cubic root of 620107644 is about 852.7512439903.

The spelling of 620107644 in words is "six hundred twenty million, one hundred seven thousand, six hundred forty-four".