620340831 has 24 divisors (see below), whose sum is σ = 981738576. Its totient is φ = 374336640.

The previous prime is 620340817. The next prime is 620340839. The reversal of 620340831 is 138043026.

It is a happy number.

620340831 is a `hidden beast` number, since 620 + 3 + 4 + 0 + 8 + 31 = 666.

It is not a de Polignac number, because 620340831 - 2¹⁰ = 620339807 is a prime.

It is a super-2 number, since 2×620340831² = 769645493211541122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 620340795 and 620340804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620340839) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9621 + ... + 36513.

It is an arithmetic number, because the mean of its divisors is an integer number (40905774).

Almost surely, 2^620340831 is an apocalyptic number.

620340831 is a deficient number, since it is larger than the sum of its proper divisors (361397745).

620340831 is a wasteful number, since it uses less digits than its factorization.

620340831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27143 (or 27140 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 620340831 is about 24906.6423068225. The cubic root of 620340831 is about 852.8581209097.

Adding to 620340831 its reverse (138043026), we get a palindrome (758383857).

The spelling of 620340831 in words is "six hundred twenty million, three hundred forty thousand, eight hundred thirty-one".