620639448 has 128 divisors (see below), whose sum is σ = 1837382400. Its totient is φ = 172224000.

The previous prime is 620639447. The next prime is 620639449. The reversal of 620639448 is 844936026.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (620639447) and next prime (620639449).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620639441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 476398 + ... + 477698.

It is an arithmetic number, because the mean of its divisors is an integer number (14354550).

Almost surely, 2^620639448 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 620639448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (918691200).

620639448 is an abundant number, since it is smaller than the sum of its proper divisors (1216742952).

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

620639448 is a wasteful number, since it uses less digits than its factorization.

620639448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473 (or 1469 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 620639448 is about 24912.6363117194. The cubic root of 620639448 is about 852.9949473479.

It can be divided in two parts, 6206 and 39448, that added together give a palindrome (45654).

The spelling of 620639448 in words is "six hundred twenty million, six hundred thirty-nine thousand, four hundred forty-eight".