612405020 has 24 divisors (see below), whose sum is σ = 1287153504. Its totient is φ = 244751936.

The previous prime is 612404963. The next prime is 612405023. The reversal of 612405020 is 20504216.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 612404983 and 612405001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612405023) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11942 + ... + 36978.

It is an arithmetic number, because the mean of its divisors is an integer number (53631396).

Almost surely, 2^612405020 is an apocalyptic number.

It is an amenable number.

612405020 is an abundant number, since it is smaller than the sum of its proper divisors (674748484).

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

612405020 is a wasteful number, since it uses less digits than its factorization.

612405020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26269 (or 26267 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 612405020 is about 24746.8183813597. The cubic root of 612405020 is about 849.2057263118.

Adding to 612405020 its reverse (20504216), we get a palindrome (632909236).

The spelling of 612405020 in words is "six hundred twelve million, four hundred five thousand, twenty".