620334144 has 84 divisors (see below), whose sum is σ = 1802555196. Its totient is φ = 203931648.

The previous prime is 620334139. The next prime is 620334163. The reversal of 620334144 is 441433026.

620334144 is a `hidden beast` number, since 620 + 3 + 34 + 1 + 4 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 328334400 + 291999744 = 18120^2 + 17088^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34672 + ... + 49424.

Almost surely, 2^620334144 is an apocalyptic number.

620334144 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 620334144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (901277598).

620334144 is an abundant number, since it is smaller than the sum of its proper divisors (1182221052).

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

620334144 is a wasteful number, since it uses less digits than its factorization.

620334144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14844 (or 14831 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 620334144 is about 24906.5080651624. The cubic root of 620334144 is about 852.8550564208.

The spelling of 620334144 in words is "six hundred twenty million, three hundred thirty-four thousand, one hundred forty-four".