620445401 has 16 divisors (see below), whose sum is σ = 682421760. Its totient is φ = 562161600.

The previous prime is 620445383. The next prime is 620445403. The reversal of 620445401 is 104544026.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620445401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620445403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26576 + ... + 44126.

It is an arithmetic number, because the mean of its divisors is an integer number (42651360).

Almost surely, 2^620445401 is an apocalyptic number.

It is an amenable number.

620445401 is a deficient number, since it is larger than the sum of its proper divisors (61976359).

620445401 is a wasteful number, since it uses less digits than its factorization.

620445401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17656.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 620445401 is about 24908.7414575687. The cubic root of 620445401 is about 852.9060399238.

Adding to 620445401 its reverse (104544026), we get a palindrome (724989427).

The spelling of 620445401 in words is "six hundred twenty million, four hundred forty-five thousand, four hundred one".