620406252 has 18 divisors (see below), whose sum is σ = 1568249228. Its totient is φ = 206802072.

The previous prime is 620406247. The next prime is 620406253. The reversal of 620406252 is 252604026.

620406252 is a `hidden beast` number, since 6 + 2 + 0 + 406 + 252 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (620406253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8616718 + ... + 8616789.

Almost surely, 2^620406252 is an apocalyptic number.

It is an amenable number.

620406252 is an abundant number, since it is smaller than the sum of its proper divisors (947842976).

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

620406252 is a wasteful number, since it uses less digits than its factorization.

620406252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17233517 (or 17233512 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 620406252 is about 24907.9555965559. The cubic root of 620406252 is about 852.8881005957. Note that the first 3 decimals are identical.

The spelling of 620406252 in words is "six hundred twenty million, four hundred six thousand, two hundred fifty-two".