620934405 has 128 divisors (see below), whose sum is σ = 1277337600. Its totient is φ = 250629120.

The previous prime is 620934403. The next prime is 620934409. The reversal of 620934405 is 504439026.

It is not a de Polignac number, because 620934405 - 2¹ = 620934403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620934403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4167271 + ... + 4167419.

It is an arithmetic number, because the mean of its divisors is an integer number (9979200).

Almost surely, 2^620934405 is an apocalyptic number.

620934405 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

620934405 is an abundant number, since it is smaller than the sum of its proper divisors (656403195).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

620934405 is a wasteful number, since it uses less digits than its factorization.

620934405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 620934405 is about 24918.5554356588. Note that the first 3 decimals coincide. The cubic root of 620934405 is about 853.1300536941.

The spelling of 620934405 in words is "six hundred twenty million, nine hundred thirty-four thousand, four hundred five".