620406393 has 16 divisors (see below), whose sum is σ = 879465600. Its totient is φ = 388154624.

The previous prime is 620406361. The next prime is 620406401. The reversal of 620406393 is 393604026.

It is not a de Polignac number, because 620406393 - 2⁵ = 620406361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (620406323) 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, 81168 + ... + 88481.

It is an arithmetic number, because the mean of its divisors is an integer number (54966600).

Almost surely, 2^620406393 is an apocalyptic number.

It is an amenable number.

620406393 is a deficient number, since it is larger than the sum of its proper divisors (259059207).

620406393 is a wasteful number, since it uses less digits than its factorization.

620406393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169728.

The product of its (nonzero) digits is 23328, while the sum is 33.

The square root of 620406393 is about 24907.9584269767. The cubic root of 620406393 is about 852.8881652077. Note that the first 3 decimals are identical.

The spelling of 620406393 in words is "six hundred twenty million, four hundred six thousand, three hundred ninety-three".