620728144 has 40 divisors (see below), whose sum is σ = 1229742720. Its totient is φ = 303433728.

The previous prime is 620728139. The next prime is 620728193. The reversal of 620728144 is 441827026.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180489 + ... + 183895.

It is an arithmetic number, because the mean of its divisors is an integer number (30743568).

Almost surely, 2^620728144 is an apocalyptic number.

It is an amenable number.

620728144 is a deficient number, since it is larger than the sum of its proper divisors (609014576).

620728144 is a wasteful number, since it uses less digits than its factorization.

620728144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3667 (or 3661 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 620728144 is about 24914.4163889103. The cubic root of 620728144 is about 853.0355794392.

The spelling of 620728144 in words is "six hundred twenty million, seven hundred twenty-eight thousand, one hundred forty-four".