620891220 has 48 divisors (see below), whose sum is σ = 1767971520. Its totient is φ = 162763776.

The previous prime is 620891209. The next prime is 620891231. The reversal of 620891220 is 22198026.

620891220 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (620891209) and next prime (620891231).

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

It is a congruent number.

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, 84157 + ... + 91236.

It is an arithmetic number, because the mean of its divisors is an integer number (36832740).

Almost surely, 2^620891220 is an apocalyptic number.

620891220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

620891220 is an abundant number, since it is smaller than the sum of its proper divisors (1147080300).

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

620891220 is a wasteful number, since it uses less digits than its factorization.

620891220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175464 (or 175462 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 620891220 is about 24917.6888976486. The cubic root of 620891220 is about 853.1102752896.

The spelling of 620891220 in words is "six hundred twenty million, eight hundred ninety-one thousand, two hundred twenty".