612838420 has 12 divisors (see below), whose sum is σ = 1286960724. Its totient is φ = 245135360.

The previous prime is 612838409. The next prime is 612838433. The reversal of 612838420 is 24838216.

It can be written as a sum of positive squares in 2 ways, for example, as 257666704 + 355171716 = 16052^2 + 18846^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 15320941 + ... + 15320980.

It is an arithmetic number, because the mean of its divisors is an integer number (107246727).

Almost surely, 2^612838420 is an apocalyptic number.

It is an amenable number.

612838420 is an abundant number, since it is smaller than the sum of its proper divisors (674122304).

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

612838420 is a wasteful number, since it uses less digits than its factorization.

612838420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30641930 (or 30641928 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 612838420 is about 24755.5735138574. The cubic root of 612838420 is about 849.4060071508.

The spelling of 612838420 in words is "six hundred twelve million, eight hundred thirty-eight thousand, four hundred twenty".