620072755 has 8 divisors (see below), whose sum is σ = 776439072. Its totient is φ = 474490368.

The previous prime is 620072753. The next prime is 620072759. The reversal of 620072755 is 557270026.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 620072755 - 2¹ = 620072753 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 620072755.

It is not an unprimeable number, because it can be changed into a prime (620072753) by changing a digit.

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, 2695854 + ... + 2696083.

It is an arithmetic number, because the mean of its divisors is an integer number (97054884).

Almost surely, 2^620072755 is an apocalyptic number.

620072755 is a deficient number, since it is larger than the sum of its proper divisors (156366317).

620072755 is a wasteful number, since it uses less digits than its factorization.

620072755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5391965.

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 620072755 is about 24901.2601086772. The cubic root of 620072755 is about 852.7352509626.

The spelling of 620072755 in words is "six hundred twenty million, seventy-two thousand, seven hundred fifty-five".