620909278338 has 32 divisors (see below), whose sum is σ = 1314021335040. Its totient is φ = 195050028240.

The previous prime is 620909278333. The next prime is 620909278387. The reversal of 620909278338 is 833872909026.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (620909278333) 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, 14236270 + ... + 14279817.

It is an arithmetic number, because the mean of its divisors is an integer number (41063166720).

Almost surely, 2^620909278338 is an apocalyptic number.

620909278338 is an abundant number, since it is smaller than the sum of its proper divisors (693112056702).

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

620909278338 is a wasteful number, since it uses less digits than its factorization.

620909278338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28516302.

The product of its (nonzero) digits is 7838208, while the sum is 57.

The spelling of 620909278338 in words is "six hundred twenty billion, nine hundred nine million, two hundred seventy-eight thousand, three hundred thirty-eight".