624420945 has 12 divisors (see below), whose sum is σ = 1082329716. Its totient is φ = 333024480.

The previous prime is 624420919. The next prime is 624420967. The reversal of 624420945 is 549024426.

624420945 is a `hidden beast` number, since 624 + 4 + 20 + 9 + 4 + 5 = 666.

624420945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 444029184 + 180391761 = 21072^2 + 13431^2 .

It is not a de Polignac number, because 624420945 - 2⁸ = 624420689 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6937966 + ... + 6938055.

It is an arithmetic number, because the mean of its divisors is an integer number (90194143).

Almost surely, 2^624420945 is an apocalyptic number.

It is an amenable number.

624420945 is a deficient number, since it is larger than the sum of its proper divisors (457908771).

624420945 is a wasteful number, since it uses less digits than its factorization.

624420945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13876032 (or 13876029 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 624420945 is about 24988.4162163191. The cubic root of 624420945 is about 854.7238463856.

The spelling of 624420945 in words is "six hundred twenty-four million, four hundred twenty thousand, nine hundred forty-five".