620000442 has 24 divisors (see below), whose sum is σ = 1376100180. Its totient is φ = 201625920.

The previous prime is 620000389. The next prime is 620000449. The reversal of 620000442 is 244000026.

620000442 is a `hidden beast` number, since 620 + 0 + 0 + 0 + 4 + 42 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 560695041 + 59305401 = 23679^2 + 7701^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (620000449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 419317 + ... + 420792.

Almost surely, 2^620000442 is an apocalyptic number.

620000442 is an abundant number, since it is smaller than the sum of its proper divisors (756099738).

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

620000442 is a wasteful number, since it uses less digits than its factorization.

620000442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840158 (or 840155 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 620000442 is about 24899.8080715495. The cubic root of 620000442 is about 852.7021009594.

Adding to 620000442 its reverse (244000026), we get a palindrome (864000468).

The spelling of 620000442 in words is "six hundred twenty million, four hundred forty-two", and thus it is an aban number.