451422720 has 400 divisors, whose sum is σ = 1853774208. Its totient is φ = 102850560.

The previous prime is 451422701. The next prime is 451422721. The reversal of 451422720 is 27224154.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (451422721) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1451365 + ... + 1451675.

Almost surely, 2^451422720 is an apocalyptic number.

451422720 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 451422720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (926887104).

451422720 is an abundant number, since it is smaller than the sum of its proper divisors (1402351488).

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

451422720 is an equidigital number, since it uses as much as digits as its factorization.

451422720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 451422720 is about 21246.7108042633. The cubic root of 451422720 is about 767.1161707624.

Adding to 451422720 its reverse (27224154), we get a palindrome (478646874).

The spelling of 451422720 in words is "four hundred fifty-one million, four hundred twenty-two thousand, seven hundred twenty".