451940868 has 36 divisors (see below), whose sum is σ = 1170273468. Its totient is φ = 146972160.

The previous prime is 451940857. The next prime is 451940873. The reversal of 451940868 is 868049154.

It can be written as a sum of positive squares in 2 ways, for example, as 38713284 + 413227584 = 6222^2 + 20328^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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, 151621 + ... + 154572.

Almost surely, 2^451940868 is an apocalyptic number.

It is an amenable number.

451940868 is an abundant number, since it is smaller than the sum of its proper divisors (718332600).

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

451940868 is a wasteful number, since it uses less digits than its factorization.

451940868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306244 (or 306239 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 451940868 is about 21258.9009123238. The cubic root of 451940868 is about 767.4095600195.

The spelling of 451940868 in words is "four hundred fifty-one million, nine hundred forty thousand, eight hundred sixty-eight".