620521320 has 32 divisors (see below), whose sum is σ = 1861564320. Its totient is φ = 165472320.

The previous prime is 620521289. The next prime is 620521331. The reversal of 620521320 is 23125026.

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, 2585386 + ... + 2585625.

It is an arithmetic number, because the mean of its divisors is an integer number (58173885).

Almost surely, 2^620521320 is an apocalyptic number.

620521320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

620521320 is an abundant number, since it is smaller than the sum of its proper divisors (1241043000).

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

620521320 is a wasteful number, since it uses less digits than its factorization.

620521320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5171025 (or 5171021 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 620521320 is about 24910.2653538657. The cubic root of 620521320 is about 852.9408262953.

Adding to 620521320 its reverse (23125026), we get a palindrome (643646346).

The spelling of 620521320 in words is "six hundred twenty million, five hundred twenty-one thousand, three hundred twenty".