620435641 has 16 divisors (see below), whose sum is σ = 718541824. Its totient is φ = 524736144.

The previous prime is 620435623. The next prime is 620435663. The reversal of 620435641 is 146534026.

620435641 = T₁₀₈ + T₁₀₉ + ... + T₁₅₄₉.

It is a cyclic number.

It is not a de Polignac number, because 620435641 - 2¹⁵ = 620402873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (620435441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219946 + ... + 222748.

It is an arithmetic number, because the mean of its divisors is an integer number (44908864).

Almost surely, 2^620435641 is an apocalyptic number.

It is an amenable number.

620435641 is a deficient number, since it is larger than the sum of its proper divisors (98106183).

620435641 is a wasteful number, since it uses less digits than its factorization.

620435641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3220.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 620435641 is about 24908.5455416409. The cubic root of 620435641 is about 852.9015676492.

Adding to 620435641 its reverse (146534026), we get a palindrome (766969667).

The spelling of 620435641 in words is "six hundred twenty million, four hundred thirty-five thousand, six hundred forty-one".