620655405 has 16 divisors (see below), whose sum is σ = 993358080. Its totient is φ = 330913088.

The previous prime is 620655401. The next prime is 620655407. The reversal of 620655405 is 504556026.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 620655405 - 2² = 620655401 is a prime.

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, 87004 + ... + 93866.

It is an arithmetic number, because the mean of its divisors is an integer number (62084880).

Almost surely, 2^620655405 is an apocalyptic number.

It is an amenable number.

620655405 is a deficient number, since it is larger than the sum of its proper divisors (372702675).

620655405 is a wasteful number, since it uses less digits than its factorization.

620655405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12900.

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 620655405 is about 24912.9565688218. The cubic root of 620655405 is about 853.0022576168.

The spelling of 620655405 in words is "six hundred twenty million, six hundred fifty-five thousand, four hundred five".