645303942 has 16 divisors (see below), whose sum is σ = 1434008880. Its totient is φ = 215101296.

The previous prime is 645303929. The next prime is 645303949. The reversal of 645303942 is 249303546.

645303942 is a `hidden beast` number, since 645 + 3 + 0 + 3 + 9 + 4 + 2 = 666.

645303942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 645303897 and 645303906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645303949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5974983 + ... + 5975090.

It is an arithmetic number, because the mean of its divisors is an integer number (89625555).

Almost surely, 2^645303942 is an apocalyptic number.

645303942 is an abundant number, since it is smaller than the sum of its proper divisors (788704938).

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

645303942 is a wasteful number, since it uses less digits than its factorization.

645303942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11950084 (or 11950078 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 645303942 is about 25402.8333459085. The cubic root of 645303942 is about 864.1479540220.

The spelling of 645303942 in words is "six hundred forty-five million, three hundred three thousand, nine hundred forty-two".