620435642 has 8 divisors (see below), whose sum is σ = 932520000. Its totient is φ = 309595644.

The previous prime is 620435623. The next prime is 620435663. The reversal of 620435642 is 246534026.

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

It is a junction number, because it is equal to n+sod(n) for n = 620435599 and 620435608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309842 + ... + 311837.

It is an arithmetic number, because the mean of its divisors is an integer number (116565000).

Almost surely, 2^620435642 is an apocalyptic number.

620435642 is a deficient number, since it is larger than the sum of its proper divisors (312084358).

620435642 is a wasteful number, since it uses less digits than its factorization.

620435642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622180.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 620435642 is about 24908.5455617144. The cubic root of 620435642 is about 852.9015681074.

Adding to 620435642 its reverse (246534026), we get a palindrome (866969668).

The spelling of 620435642 in words is "six hundred twenty million, four hundred thirty-five thousand, six hundred forty-two".