620655406 has 32 divisors (see below), whose sum is σ = 1121967360. Its totient is φ = 251548416.

The previous prime is 620655401. The next prime is 620655407. The reversal of 620655406 is 604556026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620655401) 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, 177285 + ... + 180751.

It is an arithmetic number, because the mean of its divisors is an integer number (35061480).

Almost surely, 2^620655406 is an apocalyptic number.

620655406 is a deficient number, since it is larger than the sum of its proper divisors (501311954).

620655406 is a wasteful number, since it uses less digits than its factorization.

620655406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4168.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 620655406 is about 24912.9565888917. The cubic root of 620655406 is about 853.0022580749.

The spelling of 620655406 in words is "six hundred twenty million, six hundred fifty-five thousand, four hundred six".