620443405 has 8 divisors (see below), whose sum is σ = 744872184. Its totient is φ = 496128000.

The previous prime is 620443403. The next prime is 620443409. The reversal of 620443405 is 504344026.

It can be written as a sum of positive squares in 4 ways, for example, as 133888041 + 486555364 = 11571^2 + 22058^2 .

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

It is not a de Polignac number, because 620443405 - 2¹ = 620443403 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 (620443403) 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, 15796 + ... + 38605.

It is an arithmetic number, because the mean of its divisors is an integer number (93109023).

Almost surely, 2^620443405 is an apocalyptic number.

It is an amenable number.

620443405 is a deficient number, since it is larger than the sum of its proper divisors (124428779).

620443405 is a wasteful number, since it uses less digits than its factorization.

620443405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56687.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 620443405 is about 24908.7013912809. The cubic root of 620443405 is about 852.9051253108.

The spelling of 620443405 in words is "six hundred twenty million, four hundred forty-three thousand, four hundred five".