620198865 has 96 divisors (see below), whose sum is σ = 1304110080. Its totient is φ = 268531200.

The previous prime is 620198851. The next prime is 620198867. The reversal of 620198865 is 568891026.

620198865 is a `hidden beast` number, since 620 + 19 + 8 + 8 + 6 + 5 = 666.

It is not a de Polignac number, because 620198865 - 2⁶ = 620198801 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 620198865.

It is not an unprimeable number, because it can be changed into a prime (620198867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 197931 + ... + 201039.

It is an arithmetic number, because the mean of its divisors is an integer number (13584480).

Almost surely, 2^620198865 is an apocalyptic number.

620198865 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

620198865 is an abundant number, since it is smaller than the sum of its proper divisors (683911215).

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

620198865 is a wasteful number, since it uses less digits than its factorization.

620198865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3175 (or 3172 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 620198865 is about 24903.7921811117. The cubic root of 620198865 is about 852.7930566271.

The spelling of 620198865 in words is "six hundred twenty million, one hundred ninety-eight thousand, eight hundred sixty-five".