620657220 has 48 divisors (see below), whose sum is σ = 1740090240. Its totient is φ = 165294336.

The previous prime is 620657207. The next prime is 620657237. The reversal of 620657220 is 22756026.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43096 + ... + 55664.

It is an arithmetic number, because the mean of its divisors is an integer number (36251880).

Almost surely, 2^620657220 is an apocalyptic number.

620657220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

620657220 is an abundant number, since it is smaller than the sum of its proper divisors (1119433020).

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

620657220 is a wasteful number, since it uses less digits than its factorization.

620657220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13404 (or 13402 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 620657220 is about 24912.9929956238. The cubic root of 620657220 is about 853.0030891022.

The spelling of 620657220 in words is "six hundred twenty million, six hundred fifty-seven thousand, two hundred twenty".