620806406 has 16 divisors (see below), whose sum is σ = 1024859088. Its totient is φ = 279686400.

The previous prime is 620806397. The next prime is 620806453. The reversal of 620806406 is 604608026.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122375 + ... + 127346.

It is an arithmetic number, because the mean of its divisors is an integer number (64053693).

Almost surely, 2^620806406 is an apocalyptic number.

620806406 is a deficient number, since it is larger than the sum of its proper divisors (404052682).

620806406 is a wasteful number, since it uses less digits than its factorization.

620806406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249847.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 620806406 is about 24915.9869561693. The cubic root of 620806406 is about 853.0714284474.

It can be divided in two parts, 62080 and 6406, that added together give a palindrome (68486).

The spelling of 620806406 in words is "six hundred twenty million, eight hundred six thousand, four hundred six".