451964840 has 32 divisors (see below), whose sum is σ = 1018624680. Its totient is φ = 180483072.

The previous prime is 451964833. The next prime is 451964869. The reversal of 451964840 is 48469154.

It can be written as a sum of positive squares in 4 ways, for example, as 172607044 + 279357796 = 13138^2 + 16714^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15524 + ... + 33836.

Almost surely, 2^451964840 is an apocalyptic number.

451964840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

451964840 is an abundant number, since it is smaller than the sum of its proper divisors (566659840).

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

451964840 is a wasteful number, since it uses less digits than its factorization.

451964840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18941 (or 18937 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 451964840 is about 21259.4647157448. The cubic root of 451964840 is about 767.4231281785.

The spelling of 451964840 in words is "four hundred fifty-one million, nine hundred sixty-four thousand, eight hundred forty".