620641024 has 72 divisors (see below), whose sum is σ = 1274842800. Its totient is φ = 301436928.

The previous prime is 620641019. The next prime is 620641031. The reversal of 620641024 is 420146026.

It is a self number, because there is not a number n which added to its sum of digits gives 620641024.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2021479 + ... + 2021785.

It is an arithmetic number, because the mean of its divisors is an integer number (17706150).

Almost surely, 2^620641024 is an apocalyptic number.

620641024 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620641024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (637421400).

620641024 is an abundant number, since it is smaller than the sum of its proper divisors (654201776).

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

620641024 is a wasteful number, since it uses less digits than its factorization.

620641024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525 (or 511 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 620641024 is about 24912.6679422337. The cubic root of 620641024 is about 852.9956693554.

The spelling of 620641024 in words is "six hundred twenty million, six hundred forty-one thousand, twenty-four".