451748640 has 144 divisors (see below), whose sum is σ = 1655422272. Its totient is φ = 103251456.

The previous prime is 451748611. The next prime is 451748699. The reversal of 451748640 is 46847154.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13917 + ... + 33123.

It is an arithmetic number, because the mean of its divisors is an integer number (11495988).

Almost surely, 2^451748640 is an apocalyptic number.

451748640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 451748640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (827711136).

451748640 is an abundant number, since it is smaller than the sum of its proper divisors (1203673632).

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

451748640 is a wasteful number, since it uses less digits than its factorization.

451748640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19239 (or 19224 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 451748640 is about 21254.3793134497. The cubic root of 451748640 is about 767.3007415617.

The spelling of 451748640 in words is "four hundred fifty-one million, seven hundred forty-eight thousand, six hundred forty".