620197138 has 16 divisors (see below), whose sum is σ = 1024182720. Its totient is φ = 279320400.

The previous prime is 620197117. The next prime is 620197169. The reversal of 620197138 is 831791026.

It is a junction number, because it is equal to n+sod(n) for n = 620197097 and 620197106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126918 + ... + 131713.

It is an arithmetic number, because the mean of its divisors is an integer number (64011420).

Almost surely, 2^620197138 is an apocalyptic number.

620197138 is a deficient number, since it is larger than the sum of its proper divisors (403985582).

620197138 is a wasteful number, since it uses less digits than its factorization.

620197138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258753.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 620197138 is about 24903.7575076533. The cubic root of 620197138 is about 852.7922650665.

The spelling of 620197138 in words is "six hundred twenty million, one hundred ninety-seven thousand, one hundred thirty-eight".