620436685 has 16 divisors (see below), whose sum is σ = 812711232. Its totient is φ = 450947200.

The previous prime is 620436679. The next prime is 620436689. The reversal of 620436685 is 586634026.

It is a happy number.

It is not a de Polignac number, because 620436685 - 2¹³ = 620428493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620436689) 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 15 ways as a sum of consecutive naturals, for example, 136977 + ... + 141433.

It is an arithmetic number, because the mean of its divisors is an integer number (50794452).

Almost surely, 2^620436685 is an apocalyptic number.

It is an amenable number.

620436685 is a deficient number, since it is larger than the sum of its proper divisors (192274547).

620436685 is a wasteful number, since it uses less digits than its factorization.

620436685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7004.

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 620436685 is about 24908.5664982953. The cubic root of 620436685 is about 852.9020460382.

The spelling of 620436685 in words is "six hundred twenty million, four hundred thirty-six thousand, six hundred eighty-five".