620745506 has 16 divisors (see below), whose sum is σ = 953700000. Its totient is φ = 302859648.

The previous prime is 620745479. The next prime is 620745509. The reversal of 620745506 is 605547026.

It is not an unprimeable number, because it can be changed into a prime (620745509) 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, 104525 + ... + 110303.

It is an arithmetic number, because the mean of its divisors is an integer number (59606250).

Almost surely, 2^620745506 is an apocalyptic number.

620745506 is a deficient number, since it is larger than the sum of its proper divisors (332954494).

620745506 is a wasteful number, since it uses less digits than its factorization.

620745506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7073.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 620745506 is about 24914.7648192794. The cubic root of 620745506 is about 853.0435326072.

The spelling of 620745506 in words is "six hundred twenty million, seven hundred forty-five thousand, five hundred six".